Question # 1

The distance covered by wave in 1 sec is

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wavelength

Wave number

Wave speed

Frequency

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

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One half

Two times

Three times

Four times

The distance between two consecutive crests of troughs is called

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Time period

Wave length

Frequency

Displacement

Frequency range of hearing of cats is.

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20-20000 Hz

10- 10000 Hz

60-20000 Hz

60-70000 Hz

In sonar we use

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Sound waves

Ultrasound waves

Microwaves

Radio waves

The speed of sound in air does not depend upon

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Temperature

Pressure

Density

Medium

If the pressure of a gas is doubled, then speed of sound is.

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Doubled

Become half

Not affected

Increases by four times

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

Light waves are

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Longtail waves

Transvers waves

Stationary waves

Mechanical wave

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

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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

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

Velocity of sound is independent of

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Temperature

Density

Pressure

Medium

An oscillating mass-spring system produces

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Sound waves

Electromagnetic waves

Light waves

Periodic waves

The speed \velocity of sound is greatest in.

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Air

Steel

Ammonia

Water

Radar system is an application of.

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Chemical effect

Electric effect

Magnetic effect

Doppler's effect

the example of mechanical waves is

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Water waves

Infrared waves

Radio waves

Ultraviolet waves

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