Question # 1

On loading the prong of a tuning fork with wax, the frequency of sound.

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Increases

Decreases

Remains same

First increases then decrease

Longitudinal waves do not exhibit

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Reflection

Refraction

Polarization

Diffraction

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

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

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Decreases

Increases

Remain same

Becomes zero

In stationary waves, the particle velocity at nodes is

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Minimum

Maximum

Zero

Constant

The speed of sound in ari at 0 ^oC is 332 ms-1, Then the speed at 40 ^oC will be

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372 ms-1

356 ms-1

346 ms-1

332 ms-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 velocity of sound at 0 ^oC is 332 ms-1, the velocity of sound at 10 ^oC will be

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337.1 ms-1

338.1 ,ms-1

342.1 ms-1

328.1 ms-1

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

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One half

Two times

Three times

Four times

The waves used in radar speed trap are

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Longitudinal

Sound wave

Micro waves

Matter waves

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

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Boyle

Laplace

Newton

Einstein

The speed \velocity of sound is greatest in.

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Air

Steel

Ammonia

Water

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

Star moving towards the earth show

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Red shift

Blue shift

Green shift

Yellow shift

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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Physics ICS Part 1 Chapter 8 Online Test MCQs With Answers

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