Question # 1

the velocity of sound is maximum at 20 ^oC in

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Lead

Copper

Glass

Iron

When two identical travelling waves are superimposed, velocity of resultant wave.

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Decreases

Increases

Remain same

Becomes zero

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

the wavelength of transverse wave travelling with a speed 'v' having frequency 'f' in equal to

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f/v

Vf

V/f

f/V2

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

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One half

Two times

Three times

Four times

The speed of sound increases with the increase of in

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Pressure

Volume

Temperature

Density

Crests and trough are formed in.

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Longitudinal waves

transverse waves

Stationary waves

Compression waves

Frequency range of hearing of cats is.

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20-20000 Hz

10- 10000 Hz

60-20000 Hz

60-70000 Hz

Half wavelength corresponds to

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0 ^o

90 ^o

180 ^o

360 ^o

If 332 waves pass through a medium in 1 second with speed of 332 ms-1 then wavelength will be

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7 m

332 m

664 m

1 m

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

The Newton's formula for the speed of sound in air is

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Speed of sound in aluminum at 20 ^oC is.

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3600 m/s

5100 m/s

5130 m/s

3500 m/s

The portion of the wave above mean level is called.

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Node

Antinode

Crest

Trough

Sound waves are

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Electromagnetic waves

Transverse waves

Compressional waves

Matter waves

The distance between two consecutive trough is called.

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Displacement

Amplitude

Wave length

Wave front

The distance between two consecutive crest is called.

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Displacement

Amplitude

Wave front

Wavelength

The speed of sound in air does not depend upon

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Temperature

Pressure

Density

Medium

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Physics Fsc Part 1 Chapter 8 Online Test MCQs With Answers

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