Question # 1

A set of frequencies which are multiples of the fundamental frequency are called.

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Doppler effect

Nodal frequencies

Beat frequencies

Hamonics

Beats can be heard when difference of frequency is not more than.

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8 Hz

10 Hz

4 Hz

6 Hz

the velocity of sound is maximum at 20 ^oC in

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Lead

Copper

Glass

Iron

The profile of periodic waves generated by a source executing S.H.M is represented by a.

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Circle

Sine curve

Tangent curve

Cosine curve

Stars moving away from Earth show a

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Green shift

Blue shift

Red shift

Yellow shift

If the pressure of a gas is doubled, then speed of sound is.

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Doubled

Become half

Not affected

Increases by four times

In stationary waves the points which always remain at rest are.

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Nodes

Antinodes

Crest

Trough

Frequency range of hearing of cats is.

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20-20000 Hz

10- 10000 Hz

60-20000 Hz

60-70000 Hz

Increase in the velocity of sound in air for 1 ^oC rise in temperature is.

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61 ms-1

0.61 ms-1

161 ms-1

261 ms-1

In transverse waves the particles of medium vibrate

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Along the direction of wave

Opposite to direction of wave

Perpendicular to direction of wave

Slowly

The portion of the wave above mean level is called.

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Node

Antinode

Crest

Trough

When two waves having same frequency traveling in same direction combine, phenomenon is called

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Wave motion

Combination of waves

Interference

Diffraction

An oscillating mass-spring system produces

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Sound waves

Electromagnetic waves

Light waves

Periodic waves

The distance between two consecutive trough is called.

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Displacement

Amplitude

Wave length

Wave front

When the amplitude of a wave become double, its energy becomes

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One half

Two times

Three times

Four times

In vibrating string, the points where the amplitude is maximum are called.

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Nodes

Antinodes

Troughs

Crests

Sound waves are

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Electromagnetic waves

Transverse waves

Compressional waves

Matter waves

The experimental value for the velocity of sound in air is

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233 m-sec^-1

333 m-sec^-1

433 m-sec^-1

533 m-sec^-1

Who did give the correct formula for the speed of sound in air?

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Boyle

Laplace

Newton

Einstein

In stationary waves, the velocity of particle at the node is.

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Maximum

Infinite

Zero

Varible

The state of human blood flow can be found by using.

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Newton's formula of speed of sound

Interference of sound

Phenomena of beats

Doppler's effect of sound

In order to produce beats, the two sound waves should have.

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The same amplitude

Slightly different amplitude

The same frequency

slightly different frequencies.

The speed of sound in air does not depend upon

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Temperature

Pressure

Density

Medium

The distance between two consecutive crest is called.

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Displacement

Amplitude

Wave front

Wavelength

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