Question # 1

The periodic variations of sound between maximum and minimum loudness are called.

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Doppler's effect

reflection

Laplace correction

Beats

Which of the following is mechanical wave

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Heat

Light

Sound

None of these

Speed of sound in copper is

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38000 ms-1

3600 ms-1

3500 ms-1

3400 ms-1

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

The speed of sound increases with the increase of in

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Pressure

Volume

Temperature

Density

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

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Intensity

Speed

Frequency

Wave length

Two tuning forks of frequencies 240 Hz and 243 Hz are sounded together, the number of beats per second is.

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Zero

2

3

4

In stationary waves, the particle velocity at nodes is

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Minimum

Maximum

Zero

Constant

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

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 portion of the wave above mean level is called.

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Node

Antinode

Crest

Trough

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

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