Question # 1

The distance covered by wave in 1 sec is

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wavelength

Wave number

Wave speed

Frequency

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

According to Newton's formula, the speed of sound in air at STP is

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332 ,ms-1

340 ms-1

350 ms-1

280 ms-1

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

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Boyle

Laplace

Newton

Einstein

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

In which medium the speed of sound is greater.

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Oxygen

Air

Water

copper

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

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Intensity

Speed

Frequency

Wave length

In stationary waves, the particle velocity at nodes is

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Minimum

Maximum

Zero

Constant

According to Newton, sound travels in air under conditions of.

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Adiabatic

Isothermal

Isobaric

Isochoric

Wavelength of a wave for closed pipe having length 'l' in the fundamental mode is.

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2 l

1/2

4 l

l

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

Stationary waves are generated on a string of high l, if tension is increased , frequency of vibration will

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Decrease

Unchanged

Half

Increases

the louder the sound, the greater will be its.

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Speed

Frequency

Amplitude

Wave length

the example of mechanical waves is

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Water waves

Infrared waves

Radio waves

Ultraviolet waves

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 speed of sound increases with the increase of in

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Pressure

Volume

Temperature

Density

If 30 waves per second pass through a medium at a speed 30 ms-1, then the wavelength is.

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30 m

15 m

1 m

28 m

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

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