Question # 1

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

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Decreases

Increases

Remain same

Becomes zero

The profile of periodic waves generated by a source executing S.H.M is represented by a.

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Circle

Sine curve

Tangent curve

Cosine curve

Frequency range of hearing of cats is.

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20-20000 Hz

10- 10000 Hz

60-20000 Hz

60-70000 Hz

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

The distance covered by wave in 1 sec is

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wavelength

Wave number

Wave speed

Frequency

The mechanism of transports energy of all the waves is

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Different

Same

Complicated

Easy

Sound travel faster in

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CO2

H2

O2

He

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

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Interference

Diffraction

Beats

Stationary waves

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

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Carnot theorem

Interference

Doppler effect

Beats

The portion of the wave above mean level is called.

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Node

Antinode

Crest

Trough

A bat finding its correct location by sending

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Matter waves

Ultrasonic waves

Infrasonic waves

electromagnetic waves

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Physics English Medium Fsc Part 1 Chapter 8 Online MCQs Test MCQs With Answers

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