Question # 1

The ability of the body to return to its original shape is called

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deformation

stretching

compressing

elasticity

The force acting on a charge moving in a magnetic field

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is perpendicular to the both magnetic field and direction of motion

is proportional to the magnetic of charges

vanishes when the motion is directly opposite to the direction of field

all of the above

The conductivity of a superconductor is

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Infinite

Very large

Very small

Zero

An axis of rotation

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Is a straight line

Is normal to the plane of rotation

Passes through pivot point O

All of them

When there is no relative motion between the magnet and coil, the galvanometer indicated

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No current in the circuit

An increasing current

A decreasing current

A constant current

Either B or C

Back emf is produced due to

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Self induction

Mutual induction

A.C

Lenz's law

Which is modified form of galvanometer

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potentiometer

battery

voltmeter

slide wire bridge

The open loop gain of OP-AMP is of the order of

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10²

10³

10⁴

10⁵

Stoke;s law is not applicable when the speed of the object moving through a fluid is:

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Zero

Small

Large

None of these

Such an inductor coil which does not consume energy and is often employed for controlling a.c. without consumption of energy is called

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Choke

impedance

Semi-conductor

None

A conducting wire is drawn to double its length. Final resistivity of the material will be

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Double of the original one

Half of the original one

One fourth of the original one

Same as original one

Change in entropy is positive when heat is

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Removed

Added

Remains as is it

None of these

The pair of quantities has same dimensions?

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Power, Work

Work, Torque

Impulse, Linear momentum

Both B and C

The state of rest and state of motion are

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Irrelevant

Relative

Both

None of these

Which is constant for a satellite in orbit?

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Velocity

K.E.

Angular Momentum

Potential Energy

How many electrons are in one Coulomb ?

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6.2 × 10^-23

6.2 × 10^-21

1.6 × 10^-19

Zero

When the second condition for equilibrium, is satisfied then there is no

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Linear acceleration

Angular acceleration

Both

None of these

A motorist travels A to B at a speed at 40 km/h and returns at speed of 60 km/h.His average speed will be.

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40 km/h

48 km/h

50 km/h

60 km/h

If the object of different masses move with the same velocity, then it is more difficult to stop the

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lighter of the two

massive of the two

any one of them

both of them

Force of friction between different layers in present in

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Gases

Solids

Liquids

Both A and C

The example of nuclear fusion is:

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Formation of barium and krypton from uranium

Formation of plutonium -235 from uranium -235

Formation of helium from hydrogen

Formation of water from hydrogen and oxygen

If the instant velocity does not change, the body is moving with a

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Initial velocity

Variable velocity

Uniform velocity

None of these

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