Question # 1

In order to produce beats, the two sound waves should have.

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The same amplitude

Slightly different amplitude

The same frequency

slightly different frequencies.

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

When two waves having same frequency traveling in same direction combine, phenomenon is called

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Wave motion

Combination of waves

Interference

Diffraction

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 speed of sound is greater in solids due to their high.

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Density

Pressure

Temperature

Elasticity

Stationary waves are generated on a string of high l, if tension is increased , frequency of vibration will

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Decrease

Unchanged

Half

Increases

Which of the following is mechanical wave

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Heat

Light

Sound

None of these

The waves used in radar speed trap are

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Longitudinal

Sound wave

Micro waves

Matter waves

The portion of the wave above mean level is called.

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Node

Antinode

Crest

Trough

In transverse waves the particles of medium vibrate

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Along the direction of wave

Opposite to direction of wave

Perpendicular to direction of wave

Slowly

If 20 waves passes through he medium in 2 sec of 10 ms-1 then he wavelength is.

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200 m

2 m

1 m

0.5 m

Diffraction is a special type of

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Reflection

Polarization

Interference

Refraction

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 louder the sound, the greater will be its.

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Speed

Frequency

Amplitude

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

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

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Adiabatic

Isothermal

Isobaric

Isochoric

The speed \velocity of sound is greatest in.

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Air

Steel

Ammonia

Water

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Physics Fsc Part 1 Chapter 8 Online Test MCQs With Answers

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