Question # 1

The internal energy of a system does not depend upon the

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initial state of the system

final state of the system

path

none of them

Which quantity has the same dimension as that of impulse?

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KE

Power

Momentum

Work

A body falls freely from rest. It covers as much distance in the last second of its motion as covered in the first three seconds. The body has fallen for a time of

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3 s

5 s

7 s

9 s

0.0001210 has ____________ significant figures.

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Four

Three

Seven

Eight

The photoelectric effect, the maximum energy of photoelectrons depends on the

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particular metal surface

frequency of incident light

both of them

none of them

Waves transport energy

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without transport energy

with matter

both of them

none of them

One radian is

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Greater than one degree

Less than one degree

Equal to one degree

None of these

The work performed on an object does not depend on:

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Force applied

Angle at which force is inclined to the displacement

Initial velocity of the object

Displacement

When the bob of simple pendulum is at extreme position, its K.E. will be

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maximum

minimum

zero

all of them

The velocity of light in vacuum can be changed by changing

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Frequency

Amplitude

Wavelength

None of these

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

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300°C

573°C

600°C

743°C

Polymeric solids have

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low specific gravity

high specific gravity

either of them

none of them

A dirty carpet is to be cleaned by heating. This is an accordance with____ law of motion:

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First

Second

Third

None of these

Fog droplets are suspended in air when their weight is balanced by:

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Force of gravity

Upward trust due to air

Surface tension

None of these

At high altitude the blood oozes out of the nose and ear because

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The blood pressure increase at high altitudes

The percentage of oxygen in the air increase

The atmospheric pressure decrease there

The density of blood decrease at high altitudes

The magnetic field inside a solenoid can be increased by:

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Increasing n

Decreasing I

Increasing I

By using iron core within solenoid

All correct except (B)

The number of "Earth stations" which transmit signals to satellites and receive signals from them are:

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3

24

126

200

Atoms of hydrogen gas can be excited by passing electric current through it when the gas is filled into the discharge tube at a pressure which is

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Less than atmospheric pressure

Much less than atmospheric pressure

Greater than atmospheric pressure

Much greater than atmospheric pressure

Both C and D

Rate of diffusion is

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Faster in solids than in liquids and gases

Faster in liquids than in solids and gases

Equal to solids, liquids and gases

Faster in gases than in liquids and solids

The input resistance of the OP-AMP is the resistance between the

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(-) input and output

(+) input and output

(-) and (+) inputs

between any inputs

In process of annihilation of matter, the two photons produced move in opposite direction to converse

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momentum

charge

energy

mass

The direction of the streamlines is the same as the direction of the

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force

torque

velocity

weight

When a platinum wire is heated, it appears white at

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1600°C

900°C

1100°C

1300°C

A convex lens acts as diverging lens when the object is placed:

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Between F and 2F

At 2F

With focal length

Beyond 2F

Number of supplementary units are

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Three

Two

Seven

Five

SI unit of wave length is:

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Kilometer

Metre

Centimetre

Hertz

A swing has

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one natural frequency

two natural frequencies

three natural frequencies

four natural frequencies

When a shell explodes in mid-air, its fragments fly off in

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only one direction

in two direction

different directions

a particular direction

The earth's potential is taken as

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Negative

Positive

Zero

Infinite

A semi-conductor in its extremely pure form is known as

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extrinsic semi-conductor

intrinsic semi-conductor

either of them

none of them

Which force is not a conservative force:

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Frictional force

Gravitational force

Electric force

Elastic spring force

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