Question # 1

The velocity of sound is greatest in

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Water

Air

Vacuum

Metal

Si units of time period is

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second

hertz

revolution

vibration/sec

Two sound waves of slightly different frequencies propagating in the same direction produce beats due to

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Interference

Diffraction

Polarization

Refraction

In compressional wave,the layer of medium having reduced pressure is called:

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Compression

Elasticity

Node

Rarefaction

The damping depends upon the

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amplitude

sharpness

both of them

none of them

When sound waves travel from air to water which of these remains constant?

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Velocity

Frequency

Wavelength

All the above

An object undergoes S.H.M has maximum speed when its displacement from the mean position is

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maximum

zero

half of the maximum value

one third of the maximum value

Time period of simple pendulum is independent of

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length

mass

acceleration due to gravity

none of them

When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be

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45°

90°

135°

180°

Waves transport energy

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without transport energy

with matter

both of them

none of them

With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are

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Energy, momentum and mass

Energy

Energy and mass

Energy and linear momentum

A weakly damped system has fairly

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sharp resonance curve

flat resonance curve

both of them

none of them

A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:

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Longitudinal wave

Transverse wave

No vibration at all

None of them

If one end of a rubber cord is fixed with a support and the other end is wiggled by hand, the waves generated on the card are:

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Stationary waves

Transverse waves

Both of these

None of these

Longitudinal waves are also called:

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Congressional waves

Transverse waves

Radio waves

None of them

If the time period a simple pendulum is 2 s, its frequency would be

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2 Hz

1.5 Hz

1.0 Hz

0.5 Hz

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