Question # 1

Which of the following is not mechanical wave?

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Sound wave

Light wave

wave produced in spring

None of them

The waves which propagate by the collision of material particles are known as

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e.m. waves

mechanical waves

light waves

microwaves

To hear a clear echo, the reflecting surface must be at a minimum distance of

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10 m

16.5 m

33 m

66 m

Fluids can transmit:

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Transverse wave

Compressional wave

Both of them

None of them

Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of

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very small energy

very large energy

frictional forces

acceleration due to gravity

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

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Velocity

Frequency

Wavelength

All the above

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

The weight 'mg' of the bob is resolved into

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one component

two components

three components

four components

Which type of wave can be set up in solids

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longitudinal waves

transverse waves

both of them

none of them

A heavily damped system has a fairly

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sharp resonance curve

flat resonance curve

both of them

none of them

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

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Compression

Elasticity

Node

Rarefaction

The waves in which the particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves are known as

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longitudinal waves

transverse waves

non-mechanical waves

none of them

If we increase the length of a simple pendulum four times, its time period will become

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2 times

3 times

4 times

6 times

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

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Interference

Diffraction

Polarization

Refraction

A wave, which transfer energy by moving away from the source of disturbance is called a

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progressive wave

travelling wave

both of them

none of them

Laplace formula is derived from

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Isothermal change

Adiabatic change

Isobaric change

None of these

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