Question # 1

If a stretched string 4 m long and it has 4 loops of stationary waves, then the wave length is.

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1m

2 m

3 m

4 m

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

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Doppler effect

Nodal frequencies

Beat frequencies

Hamonics

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

In which medium the speed of sound is greater.

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Oxygen

Air

Water

copper

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

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8 Hz

10 Hz

4 Hz

6 Hz

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.

When sound waves enter in different medium, the quantity that remains unchanged is.

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Intensity

Speed

Frequency

Wave length

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

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Boyle

Laplace

Newton

Einstein

Half wavelength corresponds to

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0 ^o

90 ^o

180 ^o

360 ^o

The speed \velocity of sound is greatest in.

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Air

Steel

Ammonia

Water

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 wavelength of fundamental note in one end closed pipe in term of length 'l' of pipe is.

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4 l

2l

l

1/4 l

The distance between two consecutive trough is called.

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Displacement

Amplitude

Wave length

Wave front

Two tunign forks of frequencies 260 Hz and 256 Hz are sounded together , the number of beats per second is.

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2

258

516

4

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

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Nodes

Antinodes

Troughs

Crests

Speed of sound in vacuum is

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280 ms-1

332 ms-1

333 ms-1

Zero ms-1

The speed of sound is greater in solids due to their high.

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Density

Pressure

Temperature

Elasticity

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Physics Fsc Part 1 Chapter 8 Online Test MCQs With Answers

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