Question # 1

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

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Maximum

Infinite

Zero

Varible

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 in air does not depend upon

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Temperature

Pressure

Density

Medium

Speed of sound in vacuum is

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280 ms-1

332 ms-1

333 ms-1

Zero ms-1

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

Teh speed of sound in air is 340 m/s. If the pressure of air is doubled then the speed becomes.

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Double

Half

Four times

Remains same

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

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.

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

The speed \velocity of sound is greatest in.

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Air

Steel

Ammonia

Water

A bat finding its correct location by sending

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Matter waves

Ultrasonic waves

Infrasonic waves

electromagnetic waves

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

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

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Boyle

Laplace

Newton

Einstein

A stationary waves is established din a string which vibrates in four segments at a frequency of 120 Hz, Its fundamental frequency is.

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15 Hz

30 HZ

60 Hz

480 Hz

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

Waves transport energy without transporting

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Matter

Force

Momentum

All of these

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

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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

The speed of sound increases with the increase of in

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Pressure

Volume

Temperature

Density

Increase in speed of sound for 1 ^oC rise in temperature is.

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0.61 ms-1

0.61 cms-1

61 ms-1

6.1 ms-1

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

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

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Decreases

Increases

Remain same

Becomes zero

The pitch of sound deepens upon

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Intensity of sound

Loudness of sound

Wavelength of sound

Frequency of sound

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Physics Fsc Part 1 Chapter 8 Online Test MCQs With Answers

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