Question # 1

When two identical waves superimposed, which can change.

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Wave length

Frequency

Velocity

Amplitude

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

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One half

Two times

Three times

Four times

On loading the prong of a tuning fork with wax, the frequency of sound.

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Increases

Decreases

Remains same

First increases then decrease

Which of the following is mechanical wave

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Heat

Light

Sound

None of these

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

The speed of sound in air does not depend upon

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Temperature

Pressure

Density

Medium

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

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8 Hz

10 Hz

4 Hz

6 Hz

When the amplitude of a wave is increase to doubled is energy.

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Remain the same

Increases 4 times

Increases by two times

Decreases by half

Two tuning forks of frequencies 240 Hz and 243 Hz are sounded together, the number of beats per second is.

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Zero

2

3

4

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.

Waves transport energy without transporting

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Matter

Force

Momentum

All of these

The distance between two consecutive crests of troughs is called

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Time period

Wave length

Frequency

Displacement

Longitudinal waves do not exhibit

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Reflection

Refraction

Polarization

Diffraction

In stationary waves, the particle velocity at nodes is

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Minimum

Maximum

Zero

Constant

The speed of sound increases with the increase of in

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Pressure

Volume

Temperature

Density

The error in speed of sound calculated by Newton at STP is about.

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0 %

14 %

15 %

16 %

the velocity of sound at 0 ^oC is 332 ms-1, the velocity of sound at 10 ^oC will be

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337.1 ms-1

338.1 ,ms-1

342.1 ms-1

328.1 ms-1

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