Question # 1

Which one is related to angular motion:

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Moment of a force

Moment of inertia

Moment of momentum

None of these

Electromagnetic waves transport:

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Energy only

Momentum only

Both A and B are correct

None of is correct

A massive object falls through a fluid:

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Faster

Slower

Slowest

None

A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which force makes with the direction of motion of a body is:

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0°

30°

60°

90°

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

When a shall explodes a mid-air, the total momentum of its fragments is

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less than the momentum of shell

equal to the momentum of shell

greater than the momentum of shell

none of them

Ohm is the unit of

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current

capacitance

energy

resistance

When a mass 'm' is pulled slowly, the spring stretches by an amount x₀,then the average force would be

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F= Kx₀

F=1/2Kx₀

F=2Kx₀

F=4Kx₀

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

In transverse waves, the individual particles of the medium move:

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In circles

Perpendicular to the direction of level

Parallel to the direction of level

None of these

A circuit has a resistance of 11Ωan inductive reactance of 25Ωand a capacitance reactance of 18Ω. It is connected to an a.c. source of 200 V and 50 Hz. The current through the circuit (in amperes) is

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11

15

18

20

For incident angles equal or greater than the critical angle the glass air boundary will act as a

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Convex mirror

Concave mirror

Mirror

None if them

A liquid flows through a pipe of non-uniform cross-section. If A1 and A2 are the cross-section of the portions of the pipe at two points the ratio of velocities of liquid at these points will be

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A₁A₂

A₁/A₂

1/A₁A₂

A₂/A₁

A voltage of 600V can be obtained virtually from

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Dry battery

Nickel cadmium battery

Head and tail of cell

Transformer

A bomb of mass 12 kg initially at rest explodes into two pieces of masses 4 kg and 8 kg.The speed of the 8 kg mass is 6 ms^-1,The K.E of the 4 kg mass is

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32 j

48 j

114 j

288 j

The time rate of change of velocity is called

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Initial velocity

Uniform velocity

Accelerations

None of these

Stress beyond which a permanent deformation is observed in a body is called

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Minimum stress

Maximum

Yield stress

Plastic stress

The mother and daughter elements with the emission of 𝖰 − 𝒓𝒂𝒚𝒔, are called:

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Isotopes

Isobars

Isomers

Isodiapheres

Linear momentum is a vector quantity and has direction of

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Its displacement

Velocity

Acceleration

None of these

An average energy used to make a car is

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4 × 10⁷ J

9 × 10⁹ J

7 × 10⁸ J

8 × 10⁹ J

On moving a charge of 20 coulombs by 2 cm,2J of work is done,then the potential difference between the points is

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0.1 V

8 V

3 V

0.5 V

The property of bending of light around obstacies is called

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interference

reflection

diffraction

polarization

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