Question # 1

In sonar we use

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Sound waves

Ultrasound waves

Microwaves

Radio waves

The distance between two consecutive trough is called.

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Displacement

Amplitude

Wave length

Wave front

The experimental value for the velocity of sound in air is

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233 m-sec^-1

333 m-sec^-1

433 m-sec^-1

533 m-sec^-1

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

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Nodes

Antinodes

Crest

Trough

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 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.

According to Newton, sound travels in air under conditions of.

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Adiabatic

Isothermal

Isobaric

Isochoric

When the amplitude of a wave is increase to doubled is energy.

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Remain the same

Increases 4 times

Increases by two times

Decreases by half

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 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

Increase in speed of sound for 1 ^oC rise in temperature is.

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0.61 ms-1

0.61 cms-1

61 ms-1

6.1 ms-1

The portion of the wave above mean level is called.

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Node

Antinode

Crest

Trough

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 sound in air does not depend upon

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Temperature

Pressure

Density

Medium

Which of the following is mechanical wave

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Heat

Light

Sound

None of these

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

Sound wave can not be

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Reflected

Refracted

Diffracted

Polarized

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