Question # 1

A body is in equilibrium when its:

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Acceleration in uniform

speed in uniform

Speed and Acceleration are uniform

Acceleration is Zero.

A body is in equilibrium when its

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Acceleration is uniform

Speed is uniform

Speed and acceleration are uniform

Acceleration is zero

The formula of Density is:

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m/v

v/m

m x v

None of these

What is the effect of lubricicantion?

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Increase friction

No effect

Reduce friction

None

In which of the following state molecules don not leave their position?

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Solid

Liquid

Gas

Plasma

One Megawatt is equal to :

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1 × 106 w

1 × 102 kw

1015 w

Nil

The energy stored in a dam is:

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Electric energy

Potential energy

Kinetic energy

Thermal energy

The force exerted perpendicularly on unit of area of an object is called:& nbsp

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strain

young's modulus

pressure

buoyant force

S.I unit of force is:

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N

Ns

s

None

The unit of rate of conduction :

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JS^-1

J

K

JK^-1

What kind of waste is produced by nuclear power plant?

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Carbon di oxide

Radio active

Fuels

Toxic material

Wave equation is defined as:

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f = Tλ

f = V λ

V = 2fλ

V = fλ

Electronic message is called:

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Internet

Browser

E-mail

Computer

The speed of light in water is:

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2.0x10³ ms^-1

2.5x10³ ms^-1

2.3x10⁸ ms^-1

2.3x10^-8 ms^-1

The refractive index of air is:

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6

7

2

1,0003

The symbol of AND operation is:

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+

-

.

*

What is the direction of the magnetic field lines inside a bar magnet?

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From north pole to south pole

From south pole to north pole

From side to side

There are no magnetic field lines.

If 2 joules of energy is required to transfer one coulomb of charge from one point to another, the potential difference between these points will be:

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1V

2V

4V

6V

Electric field lines were introduced by:

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Faraday

Newton

Coulomb

Joule

The S.I unit of electric current is:

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Volt

Ampere

Coulomb

Watt

Totally reflecting prism is used in:

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periscope

binoculars

periscope and binocular

telescope

Which statement of the following is false for primary memory?

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The base of primary memory is electronics

This is a random access memory

It gets lost when computer switches off

It is built on laser technology

Vector has both of its components are negative lies in

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1st quadrant

2nd quadrant

3rd quadrant

4th quadrant

The increase in thermal pollution of environment means.

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Increase in the entropy

Decrease in the entropy

Entropy remains constant

Entropy becomes zero

The terminal velocity can be obtained by using

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Newton's law

Stock's law

Guass's law

None of these

When the body moves with constant acceleration the velocity time graph is

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Parabola

Hyperbola

Straight line

Curve

A stretched string 2 m long and it has 2 hopes of stationary waves hen the wavelength is

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4 m

2 m

3 m

1 m

Before the launch of a rocket the mass of fuel of the rocket is approximately consists of.

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60%

50%

80%

100%

When a fore of 100 N is acting on an object along x-axis then its vertical component will be.

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50 N

0 N

25 N

10 N

The sum of two or more vectors will be a single vector called

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Component vector

Position vector

-ve vector

Resultant vector

If amplitude of a simple pendulum is increased by 4 times the time period will be.

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Four times

Half

Same

Two times

Angle between ray of light and wave front is

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0 ^o

60 ^o

90 ^o

120 ^o

Angular velocity determines, How fast or, How slow a body is

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Accelerating

Vibrating

Rotating

Oscillating

If V_rms be the root mean square value of emf then its peak to peak value is given by

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In chopke coil the resistance X_L an resistance R are:

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X_L=R

X_L<<R

X_L>>R

X_L=∞

Which one is not a ductile material

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Lead

Steel

Copper

Wrought Iron

Curie is unit of.

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Conductivity

Binding energy

Radioactivity

Resistivity

Binding energy per nucleon is maximum for

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Platinum

Iron

Uranium

Lead

Charge on an electron was determined by

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Ampere

Millikan

Maxwell

Bohr

Two oppositely charged balls A and B attract the third ball C, when placed near them turn by turn The third ball C must be.

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Positively charged

Negatively charged

Electrically neutral

Positively and negatively charged

A rheostat can be used as variable resistor as well as a-------------

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Potential divider

Current divider

Wheat stone bridge

Power divider

When Ohm meter gives full scale deflection it indicates.

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Zero resistance

Infinite resistance

Small resistance

Very High resistance

The energy of photon is givne by

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mv2/2

hf

Va e

mac¹

A radio active substance has a half life of four months. 3 -fourth of the substance will decay in:

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6 months

8 months

12 months

16 months