Question # 1

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 speed \velocity of sound is greatest in.

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Air

Steel

Ammonia

Water

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

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Carnot theorem

Interference

Doppler effect

Beats

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

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Interference

Diffraction

Beats

Stationary waves

In which medium the speed of sound is greater.

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Oxygen

Air

Water

copper

In sonar we use

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Sound waves

Ultrasound waves

Microwaves

Radio waves

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

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Boyle

Laplace

Newton

Einstein

the example of mechanical waves is

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Water waves

Infrared waves

Radio waves

Ultraviolet waves

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

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

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

Light waves are

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Longtail waves

Transvers waves

Stationary waves

Mechanical wave

Crests and trough are formed in.

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Longitudinal waves

transverse waves

Stationary waves

Compression waves

The portion of the wave above mean level is called.

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Node

Antinode

Crest

Trough

the louder the sound, the greater will be its.

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Speed

Frequency

Amplitude

Wave length

Sound travel faster in

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CO2

H2

O2

He

The distance between two consecutive crests of troughs is called

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Time period

Wave length

Frequency

Displacement

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Physics Fsc Part 1 Chapter 8 Online Test MCQs With Answers

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