Question # 1

Speed of sound in vacuum is

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280 ms-1

332 ms-1

333 ms-1

Zero ms-1

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

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Adiabatic

Isothermal

Isobaric

Isochoric

A stationary waves is established din a string which vibrates in four segments at a frequency of 120 Hz, Its fundamental frequency is.

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15 Hz

30 HZ

60 Hz

480 Hz

Longitudinal waves do not exhibit

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Reflection

Refraction

Polarization

Diffraction

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

The distance covered by wave in 1 sec is

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wavelength

Wave number

Wave speed

Frequency

An oscillating mass-spring system produces

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Sound waves

Electromagnetic waves

Light waves

Periodic waves

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

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When the amplitude of a wave become double, its energy becomes

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One half

Two times

Three times

Four times

Radar system is an application of.

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Chemical effect

Electric effect

Magnetic effect

Doppler's effect

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

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Decreases

Increases

Remain same

Becomes zero

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

Waves transport energy without transporting

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Matter

Force

Momentum

All of these

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 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

In stationary waves the points which always remain at rest are.

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Nodes

Antinodes

Crest

Trough

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Physics Fsc Part 1 Chapter 8 Online Test MCQs With Answers

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