Question # 1

ax + by < c is linear inequality in

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four variables

three variables

two variables

one variable

If a,βare the roots of the equation x2 - 8x + p = 0 and a2 + β2= 40,then value of p is

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8

12

10

14

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An equation which holds good for all values of variables is called

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Equation

Conditional equation

Constant

None

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A non-terminating, non-recurring decimal represent

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A natural number

A rational number

An irrational number

A prime number

The equation of the tangent at vertex to the parabola is y2 = -8(x -3)

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y=0

x=3

x=1

x=5

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The set of all points in the plane that are equally distant from a fixed point to called a

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Parabola

ellipse

Hyperbola

Circle

(ABC)' =

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CBA'

CBA

C'B'A

C'B'A'

If all members of a sequence are real numbers then it is called

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A.P

Real Sequence

G.P

None of these

Every irrational number is

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A real number

A prime number

A natural number

An integer

If ax + bx + c =0 is satisfied by every value of x,then

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b = 0,c = 0

c = 0

b = 0

a = b = c = 0

Domain of cos x is ______

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A function of the form p(x)/Q(x) is called:

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Rational function

Logarithmic function

Exponential function

Hyperbolic function

7²ⁿ+ 3^n-1. 2^3n-3is divisible by

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24

25

9

13

Range of sin x is ______

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[-1, 1]

R

Negative real numbers

None of these

Domain of secθis

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Additive property of inequality

Commutative property

Additive inverse

Additive identity

If f(x) = x²- x then f(-2) is

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4

6

2

0

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9/4

4/9

1

None of these

If (0, 0) and (-1, 0) are end points of a diameter, then the equation of the circle is

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the largest degree of the terms in the polynomials is called

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terms of the polynomial

degree of a polynomial

co-efficient

monomial

If the circle x²+ y²+ 2gx +2fy + c = 0 passes through the origin then

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c = 0

c = -1

c = -2

c = 1

(0,1) is in the solution of the inequality

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3x + 2y > 8

2x - 3y < 4

2x + 3y > 5

x -2y < -5

6 is

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A prime integer

An irrational number

A rational number

An odd integer

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If one root of 5x2 + 13x + k = 0 be the reciprocal of the other root the value of k is

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0

2

1

5

The straight lines represented by the equation ax2+ 2hxy +by2 =0 intersects at

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(1,1)

(0,1)

(1,0)

(0,0)

Let A be a square matrix. Then, 1/2 (A-A') is

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Skew-symmetric

Symmetric

Null

None of the above

The set of real numbers is a subset of

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The set of natural numbers

The set of rational numbers

The set of integers

The set of complex numbers

The order of the matrix A is 3 x 5 and that of B is 2 x 3.The order of the matrix BA is

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2 x 3

3 x 2

2 x 5

5 x 2

sin (2π-θ)

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cosθ

sinθ

tanθ

-sinθ

For any set X, X∪X is

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X

X'

Φ

Universal Set

(2.02)4 s equal to

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16

16.6496

17

18

If ∀a,b ε R,then a +b ε R is a property

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Closure law of addition

Associative law of addition

Additive inverse

Additive identity

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12

13

14

15

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none of these

At a point 15 meters away from the base of a 15 meters high house, the angle of elevation of the top is

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90°

60°

30°

45°

P∉ A means

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Pis subset of A

Pis an element of A

P does not belongs to A

A does not element of P

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The first three terms in the expansion of (1 - x)^-3are

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1 + 3x + 6x²

1 - 3x + 6x²

-3 - 3x - 6x²

1 - 3x - 6x²

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-2x cos x²

-2x²sin x²

-x²sin x

-2x²sin x²

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A square matrix A = [aij] is upper triangular when

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cij = 0

bij = 0

aij = 0 for all i > j

dij = 0

If the matrices A and B are conformable for multiplication then (AB)^t= ______

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AB

A^tB^t

B^tA^t

A^tB

In polar form of complex number r =

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A set having only one element is called

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An empty set

Universal set

A singleton set

A power set

The number of points of intersection of two curves y = 2 sin x and y = 5x²+ 2x + 3 is

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0

1

2

None of these

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a sec(ax + b) + c

- a sec(ax + b) + c

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π / 3

π / 4

π / 6

0

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A positive integer

A negative integer

A natural number

An irrational number

Fundamental law is

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If n is any positive integer then n! > 2^n-1for

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A stationary point x is a relative exterma of y= f(x) is

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f′′ (x) > 0

f′′ (x) < 0

f′′ (x) ≠ 0

f′′(x) = 0

If the line 2x -y +k =0 is a diameter of the circle x2 +y2 +6x -6y +5 =0 then k is equal to

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12

9

6

3

√-1 b=

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b

2

2b

None of these

(1, 2) is in the solution of the inequality

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2x + y > 8

2x + y < 6

2x - y > 1

2x + 3y < 2

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none of these

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none of these

What is the 26th term of the sequence, if its general term is a_{n = (-1)}ⁿ⁺¹

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2

26

27

1

The equations of the line thro' the point (2, 3, -5) and equally inclined to the axis are

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p < r

p > rr

p + r < 0

p - r < 0

A box contains 10 red 30 white and 20 black marbles When a marble is drawn at random the probability that it is either red or white is

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1/6

1/3

1/2

2/3

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n!

0!

1

None of these

I f the focus is F ( 0,-a) and directrix is the line v=a, then equation of the parabola is:

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x² = 4ay

y² = 4ax

y² = -4ax

x² = 4ax

The sum of first n even number is

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n2

n(n+1)

n+1

n+2

The first three terms in the expansion of (1 + x)^-2are ______

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1 - 2x + 3x²

1 - 2x - 3x²

1 + 2x + 3x²

-2 -2x + 3x²

Period of Tangent function is

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0°

-π

π

2π

The total cost of 2 apples and 3 oranges is $1.70, which of the following is true

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The cost of one apple

The cost of one orange

Both have equal cost per item

Cost of each single item can not be determined

The graph of linear equation 2x + 3y = 10

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Parabola

Circle

Hyperbola

Straight line

If A is a set then any subset R of A x A is called

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relation on A

relation on B

relation from A to B

relation from B to A

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If a,b = 0 then

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a |b

a||b

a = b

None

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trigonometric equation

conditional equation

identity

None

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The area enclosed between the graph y = x²-4x and the x- axis is:

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20/3

41/3

32/3

25/3

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All letters of the word "AGAIN" are permuted in all possible ways and the words so formed (with or without meaning) are written as in dictionary, then the 50th word is

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NAAGI

NAAIG

IAANG

INAGA

The angle of depression of the point at a distance 70 meters from the foot of the tower from the top of the tower is 45^𝜊.The height of the tower is

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37m

97m

101m

70m

If tan^-13 + tan^-1x = tan^-18, then x=

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5

1/5

5/14

14/5

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A square is inscribed in the circle x²+ y²- 2x + 4y + 3 =0. Its sides are parallel to the co-ordinate axes. Then one vertex of the square is

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Sum of n terms of a geometric series if | r | < 1 is

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1

2

3

None of these

∫x/Sin² x dx is equal to:

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x cot x + ln|sin⁡x |

-x cot x - ln|sin⁡x |

x cot x - ln|sin⁡x |

x. tan x- ln|sec⁡x |

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none of these

24 can be written as a product of

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Odd factors

Even factors

Whole factors

Prime factors

Sin 270° = ______

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-1

0

1

Undefined

Vector additon is:

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Commutative

Associative

Commutative and Associative

None of these

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E-radius corresponding to < A is

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QUQ'

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Associative property of addition

Commutative property of addition

Distributive property

Additive identity

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2x + 2y

4 - x²

-x/y

x/y

Domain of y = cot x = ______

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Condign

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unavoidable

satisfactory

guarded

undeserved

Dusk : Dawn

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Senility : Childhood

Necromancy : Magic

Loquaciousness : Garrulity

Adolescence : Infancy

The teacher said to the students, "There will be no class work today."

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The teacher told the students that there would be no class work that day

The teacher told the students that there should be no class work that day

The teacher told the students that there is no class work that day

The teacher told the students that there will be no class work that day

Identify Error

It is a matter of great pity that she became a widow at such an early stage,No error

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A

B

C

D

E

Abnegation:

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Indulgence

Rejection

Compare

Final

Which of the following substances is used as an antiknock compound?

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Tetraethyl lead

Lead tetrachloride

Lead acetate

Ethyle acetate

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0.12

0.50

0.25

4.00

In Antarctica ozone depletion is due to the formation of following compound

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Acrolein

Peroxy acetyl nitrate

SO₂and SO₃

Chlorine nitrate

Which colour is imparted by sodium

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Yellow

Violet

Red

Crimson

The number of moles of solute dissolved per dm³of the solution is called :

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Normality.

Molarity.

None of above.

Wolf-kishner reduction is used for the reduction of

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Nitro compounds

Carboxylic acids

Carbonyl compounds

Olefins

If ionic product of a solution is greater than solubility product, the solution is

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Supersaturated

Saturated

Unsaturated

None of these

In Lucas test primary alcohol make as oily layer

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Immediately

In 10 mins

On heating

Not

Acetaldehyde is used to make

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Rubbber

Antiseptics

Phenolic resin

All of these

Elements have the tendency to attain 8 electrons in their valence shell. This is known as

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Octer rule

Hunds rule

Pauli exclusion principle

Auf ban principle

BOD is the oxygen demand with in days(s):

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Four

Two

Three

Five

Chloroflurocarbon releases a chemical harmful to ozone

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Fluorine

Chlorine

Nitrogen peroxide

Sulphure dioxdie

Ca, Mg, Be, Ba, belong to the same group, the order of their ionization energy values is

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Be > Mg> Ca > Ba

Ba > Ca > Mg > Be

Ca > Mg > Be > Ba

Ba > Mg > Ca > Be

pH of water is 7, if 0.01 M NaOH is added, than its pH is

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12

14

zero

10

Which one of the following is not an alkali metal

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Francium

Caesium

Rubidium

Radium

The oxides of which of the following elements will be acidic in character

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Mg

Rb

Li

Cl

Grignard reagent is not prepared in aqueous medium but prepared in ether medium because

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The reagent is highly reactive in ether

The reagent does not react with water

The reagent becomes inactive in water

The reagent reacts with water

The measurement of degree of disorder is

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Internal energy

Enthalpy

Entropy

None

Which of the following has ester linkage?

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Nylon

Bakelite

Terylene

PVC

Which of the following is not aromatic hydrogencarbon

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Benzene

Naphthalene

Toluene

Cyclohexene

Number of sigma bonds in P₄O₁₀is

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6

7

17

16

The method in which alkanes prepared by alkyle halides in the presence of palladium - charcoal is

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Hydrolysis

Electrolysis

Hydrogenation

Hydrogenolysis

Vinegar made form cane sugar, now a days synthetically contains

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Citric acid

Lactic acid

Acetic acid

Palmitic acid

The liquid obtained after passing the mixture through filter paper is termed as:

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Extract

Residue

Filtrate

Sample

The percentage of H is the highest in

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CH₄

NH₃

H₂SO₄

C₆H₁₂O₆

Splitting of spectral lines when atoms are subjected to strong electron field is called

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Zeeman effect

Stark effect

Photoelectric effect

Compton effect

75% plant nutrients are present in the fertilizer:

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Urea

NH₄NO₃

NH₃

(NH₄)₂HPO₄

Which one of the following step is not involved in determination of empirical formula

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Determination % of each element

Determination of gram atom of each element

Determination of isotopes of each element

Determination of atomic ratio of element

The bond order in No is 2.5 while that in NO⁺is 3.Which of the following statements is true for these two species?

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Bond length in NO⁺is greater than in NO

Bond length in unpredictable

Bond length in NO⁺is equal to that in NO

Bond length in NO is greater than in NO⁺

When the rate of reaction is entirely independent of the conc. of reaction molecules then order of reaction is

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Zero

First

Second

Third

The ionic bonds are

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Unidirectional

Bi-directional

Non-directional

Multi-directional

Sodium should be stored in

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Air free from moisture

Air free form carbon dioxide

Under water

Under kerosene oil

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

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Uninfluenced by occurrence of thuderstorm

Which depends on the amount of dust in air

Slightly lower than that of rain water without thunderstorm

Slighlty higher than that when the thunderstom is not there

Which of the following statements is true about Galvanic cell

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Anode is negatively charged

Reduction occurs at anode

Cathode is positively charge

Reduction occurs at cathode

Which one of the following reactions is not spontaneous

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Carboxylic acids on complete reduction in the presence of HI and red Phosphours gives:

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esters

alcohols

alkanes

aldehydes

Which is more active ?

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Alkanes

Alkenes

Alkynes

Benzene

Gooch crucible is made of:

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Brass

Porcelain

Bronze

.Gold

Choose an answer

The value of K_pfalls with rise in temperature

The value of K_pfalls with increasing pressure

Addition of V₂O₅catalyst increase the concentration of SO₃

The value of K_pis equal to K_c

On the basis of VSEPR theory SO₂is a

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Liner molecule

A bent molecule

A strong molecule

A gaseous molecule

What is the structure of the ester formed from propanoic acid and ethanol

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Depletion of ozone is more during the month:

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Jan - March

April - Ju8n

July - Aug

Sept - Nov

In sixth period 14 of its transition elements are called

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Lanthanides

Actinides

Radioactive elements

None

Picric acid is

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2, 4, 6-Trinitrotoluene

2, 4, 6-Tribomoethanol

2, 4,6-Trinitrophenol

Para-Nitrophenol

In Lucas test teriary alcohol make an oily layer

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Immediately

In 10 mins

On heating

Not

Homologues differ from each other by an integral number of

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CH₂groups

CH₃groups

CH groups

CH₄groups

Which is not a calcareous material

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Lime

Clay

Marble

Marine shell

0.5 M of H₂SO₄is diluted from 1 litre to 10 litre, normality of resulting solution is

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1 N

0.1 N

10 N

11 N

Which of these polymers is a synthetic polymer?

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Animal fat

Starch

Cellulose

Polyester

Coligative properties are the properties of

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Dilute solution which behave as nearly ideal solutions

Concentrated solutions which behave as nearly non-ideal solution

Both (i) and (ii)

Neither (i) and (ii)

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called a

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Fibre

Plastic

Varnish

Polyamide resin

The amount of heat evolved or absorbed in a chemical reaction indicated by balanced chemical equation at 25° and one atmospheric pressure is called

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Enthalpy of formation

Enthalpy of neutralization

Enthaply of combustion

Enthaply of reaction

The atomic number of an element is 35 what is the total number of electrons present in all the p-orbitals of the ground state atom of that element?

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6

11

17

23

Which of the following is not an ortho-para directing group

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A filtration process could be very time consuming if it were not aided by a gentle suction which is developed:

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If the paper covers the funnel up to its circumstances

If the paper has got small sized pores in

If the stem of funnel is large so that it dips in to filtrate

If the paper fits tightly.

Bakelite is a product formed form

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Reaction of formaldehyde with phenol

Reaction of polyethylene with phenol

Reaction of polypropylene with acid

It is a natural product

Indicate the correct statement

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All lanthanidees are present in the same group

All halogens are present in the same period

All the alkali metals are present in the same group

All the noble gases are present int he same period

Propanone is the product obtained by dehydrogenation of

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2-Propanol

1-Propanol

Isobutyl alcohol

Propanethoil

The oxidation number of H is -1 in the compound

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H₂O

H₃BO₃

NaOH

NaH

The force which holds the atoms together to form a compound is called

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A chemical bond

Van der waal's force

Dispersion force

London force

Coinage metals like Au, Pt, Ag and Cu are the least reactive metals and don't liberate H₂gas when treated with acids because

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These have very high positive values of reduction potentials

These have very high negative values of reduction potentials

Their ionization potentials are lowest

Their reduction potentials are close to SHE

Each molecule of haemoglobin is 68000 times heavier than one atom of

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C

H

N

O

The rate of a chemical reaction is directly;y proportional to product of molar concentration of reaction substance it is called :

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Low of conservation of energy.

Law of mass action.

Rate law .

Active mass rule.

An organic compound 'X' on treatment with acidified K₂Cr₂O₇gives a compound 'Y' which reacts with I₂and sodium carbonate to form Triodomethane. The compound 'X' is

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CH₃OH

CH₃CHO

CH₃CH(OH)CH₃

CH₃COCH₃

The number of groups in the periodic table is

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6

7

8

9

Activity of the enzyme is reduced by

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Temperature

Concentration

pH

Inhibitors

Which is not the form of silica?

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Amethyst quatz

Rose quatz

Smoky

None of these

Most common reactions of benzene and its derivatives are

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electrophilic addition reactions

electrophilic substitution reactions

Nucleophilic addition reactions

Nucleophilic subtitution reactions

Atomospheric pollutant is

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CO₂

CO

O₂

N₂

The rate of reaction b/w two specific time intervals is called :

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Instantaneous rate of reaction.

Average rate of reaction.

Rate of a reaction.

Minimum rate of a reaction.

A suitable solvent should dissolve maximum amount of solute at its boiling point and minimum amount at :

Choose an answer

Freezing point.

Room temperature.

Boiling point.

Sea level temperature.

Synthesis of rubber is made by polymerization of

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Chloroform

Acetylene

Divinylacetylene

Butene

A peptide having molecular mass upto 10,000 is called a

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Vitamin

Protein

Polypeptide

Dipetide

The elements in which d or f-orbitals are incomplete are called

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Transition elements

Typical elements

Actinides

lanthanides

Fungicides are the pesticides which

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Control the growth of fungus

Kill insects

Kill plants

Kill herbs

Reactivity of alkyl halides with magnisium is of the order:

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Rl > RBr> RCl > RF

RBr > RCl >RF > Rl

RCL > RF > Rl > RBr

RF >RI >RBr > RII

The solution left after the formation of crystals is called :

Choose an answer

Residue.

Filtrate.

Mother liquor.

None of these.

CL₂, N₂ and O_{2 are:}

Choose an answer

Diatomic molecules

Hetero atomic molecules

Poly-atomic molecules

Mono-atomic molecules

Which of the following method is most appropriate for the manufacture of methane?

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By reduction of CH2CL2

Wurtz reaction

Liquification of natural gas

None of these

In the extraction of iron, slag is produced which is

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CO

FeSiO₃

MgSiO₃

CaSiO₃

Reaction of acids with alcohols is also known as

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Esterification

Saponification

Alkalization

None

An alcohol with molecular formula C_nH_2n+1OH has a chiral carbon atom but does not react with MnO^-₄/H⁺what is the least number of carbon atoms such an alcohol could possess

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5

6

7

8

Which can be used for dehydration of alcohol

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P₄O₁₀

H₂SO₄

H₃PO₄

All of them

Electron affinity of sulphur is

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More than O and Se

More than O but less than Se

Less than O but more than Se

Equal to O and Se

The amount of products obtained from the balanced chemical equation is regarded as

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Theoretical yield

Actual yield

% yield

Experimental yield

How many secondary alcoholic groups are present in the structure of glucose OHC CHOH CHOHCH OH CHOH CH₂OH

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1

2

3

4

3-d series elements are present in:

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First period

Second Period

Third period

4th period

The correct arrangement of increasing order of atomic radius among Na, K, Mg, Rb is

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Mg < K < Na < Rb

Mg < Na < K < Rb

Mg < Na < Rb < K

Na < K < Rb < Mg

In 1000 molecules of 0.001 M acetic acid the number of H⁺ions is 12.6, then its percentage of ionization is

Choose an answer

1.33%

1.26%

12.6

1%

The polymers which can not be re-softened again and again are called

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Thermoplastic

Thermosetting

Both a and b

None

When a nitrogeneous base combine with a sugar it is called

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Ribose

Nucleotides

Nucleoside

None

Most reactive halide towards S_N1 reaction is

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n-Butyl chloride

sec-Butyl chloride

tert-Butyl choride

Allyl chloride

Which of the following is a molecular diseases?

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Allergy

Cancer

German measles

Sickle cell anemia

d-block elements are also called :

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alkali metal

Alkaline earth metals

Transition elements

Electron deficient elements

A catalyst is a substance which increase the rate of a chemical reaction, but remains unchanged at the end of reaction, nut remains unchanged at the end of reaction, because

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It increases the temperature

It increase the surface area

It increases the rate constant

It decrease the energy energy of activation

When sodium benzoate is treated with soda lime (NaOH) benzene is formed. What is the other product

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Na₂CO₃

NaHCO₃

Ca(OH)₂

CaCO₃

Which element forms an iron with charge 3+?

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Berylium

Aluminium

Carbon

Silicon

Minamata disease is due to pollution of

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Organic waste into drinking water

Oil spill in water

Industrial waste containing mercury into fishing water

Arsenic into the atmosphere

Which one of the following has been hydroxyl and carboxylic acid groups

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Phenols

Picric acid

Phthalic acid

Salicylic acid

Choose an answer

High temperature and low pressure

Low temperature and low pressure

Low temperature and high pressure

High temperature and high pressure

Synthetic polymer prepared from caprolactum is known is

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Nylon 610

Teflon

Terylene

Nylon-6

The vibrations of factory floor caused by the running of heavy machinery is an example of

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free vibration

natural vibrations

forced vibrations

all of them

According to the law of conservation of linear momentum, the total linear momentum of an isolated system

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increases

decreases with time

remains constant

none of them

Coulomb multiplied by volt by volt gives the unit called:

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farad

Ohm

Second

joule

Watt

According to the special theory of relativity

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mass and energy are same entities

mass and energy are same entities but interconverible

mass and energy are different entities but interconverible

mass and energy are different entities but non-interconveritble

Centripetal force for electron is given by

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mv²/ r

mv / r²

mv²/ r

mr²/ v

When a body is moving with uniform positive acceleration, the velocity- time graph is a straight line. Its slope is

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zero

negative

positive

non-existing

One radian is:

Choose an answer

Greater than one degree

Less than one degree

Equal to degree

none of these

Xerography means:

Choose an answer

Dry writing

Wet writing

Poor writing

Excellent writing

Both (A) and (B)

A train is moving with a velocity of 25 m/s and a car is moving behind it by a velocity of 8 m/s in same direction. The relative velocity of train with respect to car is

Choose an answer

17 m/s

33 m/s

17.5 m/s

none

The equation of continuity

A₁V₁= A₂V₂is for the flow of

Choose an answer

an ideal fluid

an incompressible fluid

a non visconcous fluid

all of the above

If the absolute uncertainty of an instrument is 0.0a1 cm, then its least count will be :

Choose an answer

0.005 cm

0.01 cm

0.02 cm

0.001 cm

Vibratory motion is always under

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Applied force

Restoring force

Periodic force

Gravitational force

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Choose an answer

V/e

eV

e/V

V

Significant figures in 0.0010 are

Choose an answer

Four

Three

Two

One

The flux through a closed surface depends upon:

Choose an answer

Shape of geometry of the closed surface

Charge enclosed

Nature of the medium

Both (A) and (B)

Both (B) and (C)

As the bob of the pendulum moves to and fro which of the force is experienced by the bob

Choose an answer

its weight

tension in the string

viscous drag force by air

all of them

Which one of the following is an example of resonance

Choose an answer

swing

tuning a radio

microwave oven

all of them

A field in which the work done in moving a body along closed path is zero is called

Choose an answer

Nuclear Field

Conservative field

Gravitational field

Non-conservative field

The SI unit of magnetic permeability is

Choose an answer

WB A^-1m^-1

WB mA^-1

WB Am^-1

None of these

In the study of thermodynamics, which gas is considered as the working substance

Choose an answer

real gas

ideal gas

any gas may be ideal or real

none of them

Direction of motion_______ in circular of motion:

Choose an answer

Changes off and on

Changes continuously

Does not change

None of them

The basic circuit element in D.C. circuit is:

Choose an answer

A capacitor

A resistor

An inductor

Both (A) and (C)

Both (A) and (B)

Dimensions of velocity are

Choose an answer

[L]

[T]

[LT^-1]

[LT^-2]

There is certain frequency below which no electrons are emitted from the metal surface, this frequency is known as

Choose an answer

maximum frequency

minimum frequency

threshold frequency

all of these

The most suitable material for permanent magnet is

Choose an answer

cobalt

iron

steel

alaminium

Which quantity has the same dimension as that of impulse?

Choose an answer

KE

Power

Momentum

Work

In gases, the charge carriers are:

Choose an answer

Electrons

Positive ions

Negative ions

Both A and C

Both A and B

The neighbours of every molecule in crystalline solids are arranged in

Choose an answer

an irregular manner

a regular manner

any manner

none of them

If the velocity of the body decreases non-uniformly then the slope of the velocity-time graph will have

Choose an answer

different values

same values

zero valves

constant valves

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

Choose an answer

Heating effect of current

Chemical effect of current

Magnetic effect of current

Electromagnetic effect of current

What is the current is a 2 x 10⁶ohm resistor having a potential difference of 2 x 10³volts?

Choose an answer

10^-1A

10^-2A

10^-4A

1 mA

Plan of a coil makes an angle of 20º with the lines of magnetic field. The angle between B and vector area of plane of coil is:

Choose an answer

Also 20º

70º

90º

180º

None of these

The reverse saturation current in a PN junction diode is only due to

Choose an answer

Majority carriers

Minority Carriers

Acceptor ions

Donor ions

In a transistor, the central region is called

Choose an answer

collector

emitter

base

none of them

The induced current in the loop can be Increased by

Choose an answer

Using a stronger magnetic field

Moving the loop faster

Replacing the loop by a coil of many turns

All above

Both A and B

The rear wheels of an automobile are rev/sec which is reduced to 38 rad/sec in 5 seconds when brakes are applied. Its angular acceleration is:

Choose an answer

5 rad/sec²

-10 rav/sec²

-10 rad/sec²

-5 rav/sec²

The inside cavity of the black body is

Choose an answer

painted white

painted silver

blackened with soot

painted red

The blood pressure of a person

Choose an answer

decrease with age

increase with age

has no effect with age

none of them

Which waves are used in sonography?

Choose an answer

Microwaves

Infra red waved

Sound waves

Ultrasonic waves

At the present time, the main frontiers of fundamental science are

Choose an answer

2

3

4

5

If the distance between two charges is doubled,the force between them will become:

Choose an answer

Double

Half

One third

One fourth

The magnitude of alternative voltage V:

Choose an answer

Always increase

Always decrease

Remains constant

Does not remain constant

None of these

Heating effect of current utilized in:

Choose an answer

Electric motor

Electric toaster

Electroplating

Electric kettle

Both (B) and (D)

In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.

Choose an answer

Bright

Dark

Any of A and B

None of these

The velocity of a projectile is maximum

Choose an answer

at the point of projection

just before striking the ground

at none of them

at both of them

The consumption of energy by a 60 W bulb in 2 minutes is:

Choose an answer

2 watt-hour

120 watt-hour

30 watt-hour

None of these

Inverter is the name given to:

Choose an answer

NOT gate

OR gate

NOR gate

AND gate

XOR gate

One radian is equal to:

Choose an answer

30.3°

45.3°

50.3°

57.3°

The value of current at resonance in series LCR circuit is affected by the value

Choose an answer

R only

C only

L only

R, C and L

Examples of physical quantities are:

Choose an answer

Length

Color

Effect of music

All of these

A vector of magnitude 5 N is added to a vector of magnitude 8 N while the orientations are changeable. Range of their possible sum will be very from:

Choose an answer

Zero to 3 N

1 N to 13 N

13 N to 3 N

None of these

The amount of energy equivalent to 1 a.m.u is

Choose an answer

9.315 Mev

93.15 Mev

931.5 Mev

2.22 Mev

A mass difference of 0.0012 u is equivalent to and energy of:

Choose an answer

0.5 Me V

1.13 MeV

5.13 MeV

1.13 keV

1.13 eV

A stone tied to the end of a 20 cm long string is whirled in a horizontal circle. If centripetal acceleration is 9.8 m/sec², then its angular velocity is rad/sec is:

Choose an answer

22/7

7

14

21

If a vector lies in second quadrant, than B_xand B_yare:

Choose an answer

-,+

+,-

+,+

-,-

The current that flows through the coil of a motor causes

Choose an answer

Its shaft to revolve

Its brushes to rotate

Motor to move

Its shaft to rotate

None of these

The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:

Choose an answer

1

0.2

2

0.1

An inkjet printer uses in its operation:

Choose an answer

Neutrons only

Mesons only

Positrons and photons

An electric charge

None of these

The product of cross-sectional area of the pipe and the fluid speed at any pint along the pipe is

Choose an answer

very high

very low

constant

zero

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Choose an answer

200 W

302.5

250 W

350 W

The smooth or steady stream-line flow is know as

Choose an answer

Laminar flow

Turbulent flow

Both a and b

None of the above

To see the minor details of the object by microscope, it should have:

Choose an answer

High magnifying power

High resolving power

Am objective of larger focal length

None of these

Change in momentum is one second is called:

Choose an answer

Impulse

Force

Energy

Work

Centripetal acceleration is also called ______ acceleration

Choose an answer

Tangential

Radial

Angular

None of them

A typical rocket consumes about

Choose an answer

100 kg s^-1of fuel

1000 kg s^-1of fuel

10000 kg s^-1of fuel

100000 kg s^-1of fuel

Acceleration of a body at any particular instant during its motion is known as

Choose an answer

average acceleration

uniform acceleration

instantaneous acceleration

all of them

The volume of universal gas constant R is:

Choose an answer

8.314 J/K mole K

8314 J/K mole K

8.314 J/mole K

None of these

A fuse wire is having 5 ampere current rating. What is the peak value of current it can have?

Choose an answer

0.7074 A

7.07 A

0.0707 A

7.707 A

Which of the following diodes can operate in the reverse biased condition

Choose an answer

photo diode

light emitting diode

photo voltaic cell

none of these

Amorphous solids:

Choose an answer

Have definite melting points

Are called glassy solids

Have no definite melting point

Both (B) and (C)

Both (A) and (C)

Victor de-Brogile received the Nobel prize in physics in

Choose an answer

1925

1929

1932

1935

The positive charge moving in one direction is equivalent in all external affects to a:

Choose an answer

Negative charge is moving in the same direction

Positive charge is moving in the opposite direction

Negative charge moving in the opposite direction

Positive charges moving in the same direction

None of these

Shock absorber of the car is an example of

Choose an answer

resonance

forced oscillations

interference

damped oscillations

Centripetal acceleration is also called ______ acceleration:

Choose an answer

Tangential

Radial

Angular

None of them

An object thrown in arbitrary direction in space with an initial velocity and moving freely under gravity will follow

Choose an answer

a circular path

a straight line

a hyperbola

a parabola

A certain force gives an acceleration of 2 m/sec2 to a body if mass 5 kg. The same force would give a 29 kg object an acceleration of:

Choose an answer

0.5 m/sec2

5 m/sec2

1.5 m/sec2

9.8 m/sec2

X-ray are also known as

Choose an answer

Roentgen rays

Maxwell rays

Plank range

Einstein rays

An object thrown upward with an initial velocity at certain angle with the horizontal and moving freely under the action of gravity is called

Choose an answer

a rocket

an aeroplane

a projectile

a ballon

Fraction of the decaying atoms per unit time is called

Choose an answer

decay atom

decay element

decay constant

decay

Electromagnetic waves emitted by hot bodies are called:

Choose an answer

Photoelectrons

Alpha rays

Thermal radiation

None of these

If a liquid is heated in weightlessness, the heat is transmitted through

Choose an answer

Conduction

Convection

Radiation

Neither, because the liquid cannot be heated in weightlessness

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Choose an answer

90°

0°

180°

none of these

When a vector is multiplied by a negative number, its direction:

Choose an answer

Remains the same

Changes

Changes by 180°

None of these

Instead of moving the coil towards a magnet, the magnet is moved towards the coil with the same speed. The galvanometer shows current

Choose an answer

Of same magnitude in the same direction

Of different magnitude in the same direction

Of same magnitude but in opposite direction

Of different magnitude in the opposite direction

None of these

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Choose an answer

RMS value

Instantaneous value

Valued average over a cycle

Zero

Both (B) and (C)

A choke coil is used as a resistance in

Choose an answer

d.c. circuit

a.c. circuit

d.c. potentiometer circuit

wheatstone bridge

If the displacement of a body executing S.H.M is plotted against time, then the curve is known as

Choose an answer

frequency of S.H.M

period of S.H.M

wave form

none of them

Teh consumption of energy by a 1000 watt heater in half an hour is:

Choose an answer

5 Kwh

0.5 Kwh

2.5 Kwh

3.2 Kwh

Electric flux is defined by the relation

Choose an answer

E.A.

E x A

E/A

none of these

The He-Ne laser discharge tube is filled with:

Choose an answer

85% He

15% He

50% He

60% He

85% Ne

Distance covered during one vibration of an oscillating body in terms of amplitude A is:

Choose an answer

A

2 A

3 A

4 A

A resonance curve for RLC series circuit is a plot of frequency versus

Choose an answer

Voltage

Current

Impedance

Reactance

The unit of decay constant is

Choose an answer

sex

sec²

sec^-1

sec^-2

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

Choose an answer

Peak value

RMS value

Instantaneous value

Peak-to-peak value

Both (A) and (C0

A particle of mass 0.5 g moving along x-axis is located of x₁= 15 m at t₁= 5s and x₂= 33 m at t₂= 13s its average velocity is

Choose an answer

6 m s^-1

2.45 m s^-1

2.25 m s^-1

4.45 m s^-1

Which of the following changes at an antinode in a stationary wave?

Choose an answer

Density only

Pressure only

Both pressure and density

Neither pressure nor density

A train cover 90 km in half an hour. the time taken by it to travel 15 km will be:

Choose an answer

20 minutes

48 minutes

10 minutes

5 minutes

Which quantity has different dimension:

Choose an answer

Work

Pressure

Energy

Torque

During the whole carnot cycle

Choose an answer

Thermal equilibrium is maintained

mechanical equilibrium is maintained

both the thermal and mechanical equilibriumis maintained

both the thermal and mechanical equilibrium is not maintained

Experiments revealed that the ratio of the stress to the strain is a constant value for

Choose an answer

different material

all materials

a given material

all of them

Which type of wave can be set up in solids

Choose an answer

longitudinal waves

transverse waves

both of them

none of them