Question # 1

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 distance covered by wave in 1 sec is

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wavelength

Wave number

Wave speed

Frequency

The error in speed of sound calculated by Newton at STP is about.

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0 %

14 %

15 %

16 %

The speed of stars and galaxies can be calculated by

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Compton effect

Stefan's law

Doppler's effect

Pascal's law

the example of mechanical waves is

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Water waves

Infrared waves

Radio waves

Ultraviolet waves

The process followed by Newton for the determination of speed of sound in air is

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Adiabatic

Isothermal

Isobaric

Isochoric

Star moving towards the earth show

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Red shift

Blue shift

Green shift

Yellow shift

The speed \velocity of sound is greatest in.

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Air

Steel

Ammonia

Water

If 332 waves pass through a medium in 1 second with speed of 332 ms-1 then wavelength will be

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7 m

332 m

664 m

1 m

The pitch of sound deepens upon

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Intensity of sound

Loudness of sound

Wavelength of sound

Frequency of sound

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

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Intensity

Speed

Frequency

Wave length

If the wave motion is 0.01 sec and wave speed is 100 ms-1 then frequency of wave is.

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0.5 Hz

1 Hz

10 Hz

100 Hz

Stars moving away from Earth show a

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Green shift

Blue shift

Red shift

Yellow shift

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

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

Sound travel faster in

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CO2

H2

O2

He

Diffraction is a special type of

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Reflection

Polarization

Interference

Refraction

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

The distance between two consecutive crests of troughs is called

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Time period

Wave length

Frequency

Displacement

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

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Boyle

Laplace

Newton

Einstein

the velocity of sound at 0 ^oC is 332 ms-1, the velocity of sound at 10 ^oC will be

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337.1 ms-1

338.1 ,ms-1

342.1 ms-1

328.1 ms-1

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

A bat finding its correct location by sending

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Matter waves

Ultrasonic waves

Infrasonic waves

electromagnetic waves

Which of the following is mechanical wave

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Heat

Light

Sound

None of these

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Physics Fsc Part 1 Chapter 8 Online Test MCQs With Answers

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