Question # 1

Sound travel faster in

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CO2

H2

O2

He

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

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

10 waves pass through a point in 2 seconds with speed 10 ms-1 the frequency of wave will be

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1 Hz

2 Hz

5 Hz

10 Hz

Longitudinal waves do not exhibit

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Reflection

Refraction

Polarization

Diffraction

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

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Maximum

Infinite

Zero

Varible

The distance covered by wave in 1 sec is

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wavelength

Wave number

Wave speed

Frequency

Crests and trough are formed in.

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Longitudinal waves

transverse waves

Stationary waves

Compression waves

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

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

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

Light waves are

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Longtail waves

Transvers waves

Stationary waves

Mechanical wave

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

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Decreases

Increases

Remain same

Becomes zero

The distance between two consecutive crest is called.

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Displacement

Amplitude

Wave front

Wavelength

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

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

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Intensity

Speed

Frequency

Wave length

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