Question # 1

The example of reversible process is

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an explosion

changes occur suddenly

slow compression of a gas

all of them

Zirconia is classified as:

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Ceramic solid

Ionic compound

Metal

Either (A) or (B)

Either (B) or (C)

A monkey sits on the pan of spring scale kept in an elevator. The reading of the spring scale will be maximum when

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Elevator is stationary

Elevator cable breaks and it falls freely towards earth

Elevator accelerates downwards

Elevator accelerates upward

In rotational motion, analogue of force F us called:

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Couple

Torque

Mass

Moment of intertia

When a nucleus emits an alpha particle, it atomic mass decreased by

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2

1

4

3

The energy of a photon is represented by

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h/c²

h/T

hc²

hf/c²

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

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0°C

10°C

17°C

20°C

The electric field, magnetic field and the direction of their propagation are mutually

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perpendicular

parallel

none of these

A body is dropped from a tower with zero velocity, reaches ground in 4s. The height of the tower is about

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80 m

20 m

160 m

40 m

Magnetic induction is also called as:

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Ampere’s law

Faraday’s law

Lenz’s law

Newton’s law

Coulomb’s law

When brakes are applied to a fast moving car, the passenger will be thrown:

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Forward

Backward

Downward

none of these

The unit of torr or mm of Hg is opted instead of SI unit of pressure because

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Measurement is easy

Swift calculations

Extensive use in medical equipments

None of these

A reversible process is one which can be retracted in exactly reverse order with change in the

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System

Surroundings

System and surroundings

None of these

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser,As a result its capacitance

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Increase k time

Decrease k times

Decreases 1/k times

Remains unchanged

For obtaining equal and same height mirror should be

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Convex

Concave

Plane

None

Which of the following is not a projectile?

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a bullet fired from a gun

a spaceship

a football in air

an artillery shell

Which of the following have same SI units

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Force

Impulse

Momentum

B and C

An object is placed between two parallel mirrors the number of images formed is

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2

4

8

Infinite

A science student takes 100 observations in an experiment Second time he takes 500 observations in the same experiment By doing so the possible error becomes

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5 times

1/5 times

Unchanged

None of these

Tick which of the following is not state variable:

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Heat energy

Pressure

Entropy

Volume

Reflection of light from water, glass, snow and rough road surfaces, for larger angle of incidences, produces

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images

bright images

interference

glare

In place of spark plug, the diesel engine requires also

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High speed air

High temperature air

Low temperature air

None of these

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