Question # 1

A phenomenon by which energy is dissipated from the oscillating system is called.

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Forced oscillation

Free oscillation

Damping

Simple harmonic motion

A force of 10 N acts on a body of mass 5 kg in one second. The change in its momentum will be.

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10 kgms-1

50 kg ms-1

2 kg ms-1

20 kg ms-1

The SI unit of angular momentum is

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J.S-2

J.S-1

J.S

J.m

The amplitude of a vibrating body at resonance in vacuum is

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Minimum

Maximum

Zero

Infinite

The fringe spacing in a double slit experiment can be increased by decreasing.

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Wavelength of light

Width of slits

Slit separation

Distance between the slits and the screen

When hot and cold water are mixed, the entropy.

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Decreases

Increases

Remain constant

Zero

An oscillating mass-spring system produces

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Sound waves

Electromagnetic waves

Light waves

Periodic waves

The actual efficiency of property turned petrol engine is.

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20% to 30%

30% to 35%

40% to 45%

25% to 30%

The process of confining the beam of light to vibrate in one plane is called.

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Interference

Diffraction

Polarization

Total internal refraction

Average acceleration is a

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Scalar quantity

Vector quantity

(-) ve quantity

None of these

When the rocket moves away from the earth, the work against gravity

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Remains constant

Varies directly with distance

Varies inversely with distance

Varies inversely with square of distance

During adiabatic process, which factor remains constant.

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Entropy

Pressure

Momentum

Power

A bullet shot straight up, return to its starting point in 10 sec. Its initial speed was

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9.8 ms-1

24.5 ms-1

49 ms-1

98 ms-1

With increase of temperature, speed of sound.

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Remains constant

Becomes zero

Decreases

Increases

The time period of an oscillating mass spring system is 10 second. If mass attached to spring id doubled then time period becomes.

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10 sec

20 sec

5 sec

None of these

Hygen's principle is used for.

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Explain polarization

Locate the wave front

Find the speed of light

Find the index of refraction

The light energy travels in space as waves was firstly proposed by

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Maxwell

Young

Einsten

Hydrogen

The unit o pressure of gas is

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Nm^-2

Pascal

Atmosphere

All of these

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