Question # 1

The speed \velocity of sound is greatest in.

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Air

Steel

Ammonia

Water

Waves transport energy without transporting

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Matter

Force

Momentum

All of these

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

Half wavelength corresponds to

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0 ^o

90 ^o

180 ^o

360 ^o

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

If 20 waves passes through he medium in 2 sec of 10 ms-1 then he wavelength is.

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200 m

2 m

1 m

0.5 m

The apparent change in the pitch of sound due to relative motion is called.

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Carnot theorem

Interference

Doppler effect

Beats

In stationary waves, the particle velocity at nodes is

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Minimum

Maximum

Zero

Constant

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

A stretched string 2 m long and it has 2 hopes of stationary waves hen the wavelength is

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4 m

2 m

3 m

1 m

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

Two waves of same frequency and moving in the same direction produces.

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Interference

Diffraction

Beats

Stationary waves

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

the louder the sound, the greater will be its.

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Speed

Frequency

Amplitude

Wave length

When two identical waves superimposed, which can change.

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Wave length

Frequency

Velocity

Amplitude

The periodic variations of sound between maximum and minimum loudness are called.

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Doppler's effect

reflection

Laplace correction

Beats

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

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

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Physics ICS Part 1 Chapter 8 Online Test MCQs With Answers

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