Question # 1

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

When ever the path difference between the waves is integral multiple of half the wavelength, interference will be

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Constructive

Destructive

(-)ve

(+) ve

A stretched string 2 m long and it has 2 hopes of stationary waves hen the wavelength is

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4 m

2 m

3 m

1 m

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 stars and galaxies can be calculated by

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Compton effect

Stefan's law

Doppler's effect

Pascal's law

When two identical waves superimposed, which can change.

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Wave length

Frequency

Velocity

Amplitude

Which of the following is mechanical wave

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Heat

Light

Sound

None of these

Stars moving away from Earth show a

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Green shift

Blue shift

Red shift

Yellow shift

Sound travel faster in

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CO2

H2

O2

He

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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