Question # 1

When horse pulls a cart, the action is on the:

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Cart

Earth

Horse

Earth and cart

Which law of motion is called law of inertia:

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first law of motion

Second law of motion

Third law of motion

Law of conversation of momentum

GPS system consists of earth satellites:

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4

20

24

30

Which of the following is a vector quantity?

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Distance

Power

Speed

Displacement

In thermo flask radiation is stopped by using :

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Green color

Transparent

Silver color

Nil

Water on cooling below 4 ^oC begins to:

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Expand

Contract

Boils

None of these

Sin 45^ois

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0.707

0.5

1

0.2

1 N ___________

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1 kgms^-2

1 kg ms^-1

ms^-2

All

Leslie's cube is a box of:

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Metal

Non-Metal

Wood

Metalloids

The formula to determine the centripetal force is:

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Ms

mv²/r

Ns

Ns^-1

The weight of a body is 100 N its weight on moon is :

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0.17 Kg

1.7 N

17 N

170 N

In simple Harmonic motion, the acceleration of the body is _____ proportional to the displacement.

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Inversely

Directly

Equally

None of these

The time period of mass attached with a spring can be calculated by:

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T = 2π√L/g

T = 1/T

T =2π√g/L

T = 2π√m/k

Electric field lines were introduced by:

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Faraday

Newton

Coulomb

Joule

What should household appliances be connected in parallel with the voltage source?

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to increase the resistance of the circuit

to decrease the resistance of the circuit

to provide each appliance the same voltage as the power source

to provide each appliance the same current as the power source

The resistance of voltmeter is:

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zero

low

Very high

10Ω

Give the number of factors which affect the ability of a capacitor to store charge.

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2

3

4

5

When a uranium (92 protons) ejects a beta particle, how many protons are left in the remaining nucleus?

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92 protons

91 protons

93 protons

89 protons

Which of the following reasons increase the importance of computer?

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Speedy

Long time storage of memory

Quick decision

All of these

Iron core is used in tranformer to:

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Enhance the flux

Decrease the flux

Keep flux the same

botha a and b

The critical angle for a beam of light passing from water into air is 48.8 degrees. This mean that all light rays with an angle of incidence greater than this angle will be:

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Absorbed

Totallly reflected

Partially reflected and partially transmitted

Totally transmitted

The reason carbon dating work is that.

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Plants and animals are such strong emitters of carbon 14

After a plant or animal dies, it stops in fresh carbon

There is so much non radioactive carbon dioxide in the air

When a plant or animal dies.

Angle between ray of light and wave front is

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0 ^o

60 ^o

90 ^o

120 ^o

The entropy of the universe with passage of time is.

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Increases

Decreases

Remain constant

Increases and decreases

Two tuning forks of frequencies 240 Hz and 243 Hz are sounded together, the number of beats per second is.

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Zero

2

3

4

Viscosity is represented by Greek letter

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Half wavelength corresponds to

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0 ^o

90 ^o

180 ^o

360 ^o

The terminal velocity of a droplet falling down under gravity is directly proportional to the square of

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Its density

Its radius

Its viscosity

Its elasticity

Unit of acceleration is

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ms-1

ms

ms-2

m2s

Critical angle is that incident angle in denser medium for which angle of refraction is.

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0 ^o

45 ^o

90 ^o

120 ^o

The equations of motion hold good for

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Variable acceleration

Uniform acceleration

Centripetal acceleration

All of these

1 KWh =

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3.6 x 10³K

3.6 x 10⁶K

3.6 x 10⁹J

3.6 x 10¹²J

The location of near point changes with

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Age

Size of the eye

Sharpness of the eye

None of these

In an N-type silicon, which of the following statement is true?

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Electrons are majority carriers & trivalent atoms are the dopants

Electrons are majority carriers & pentavalent atoms are the dopants

Holes are minority carriers & pentavalent atoms are the dopants.

Holes are minority carriers & trivavalent atoms are the dopants.

De-Broglie waves are associated with

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Moving charged particles only

Moving neutral particles only

All moving particles

All parties whether in motion or at rest

The radio active nuclide ₈₆Ra²²⁸ decays by a series of emissions of three alpha particles and one beta particle. The nuclide X finally formed is:

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₆₄X²²⁰

₈₆X²²²

₈₄X²¹⁶

₈₈X²¹⁵

All motions are

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Absolute

Uniform

Relative

Variable

Target material used in x-rays tube have following properties.

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High atomic number and high melting pouint

High atomic number and low melting pouint

Low atomic number and low melting pouint

High atomic number only

OR gate is represented by:

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X = A+B

X=A.B

X=A+B

X=A.B

Logic gate can control some physical parameters like.

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Temperature, Pressure

Resistance, Inductance

Capacitance, Impedance

Current, voltage

A dot represents the direction of magnetic field.

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Out of page

Into the page

Tangent to page

Parallels to page

Electron volt is the unit of.

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Potential

Potential difference

Electric current

Electric energy

The value of Rydberg constant is:

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1.0749x10⁷m^-1

1.0974 x 10⁷ m^-1

1.974 x10⁶m^-1

1.0974 x 10^-7 m^-1

The basic circuit element in A.C. circuit which controls current.

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Resistor only

Capacitor only

Inductor only

All of these