Question # 1

SI unit of wave length is:

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Kilometer

Metre

Centimetre

Hertz

The waves in which the particles of the medium have displacement along the direction of propagation of waves are called

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longitudinal waves

transverse waves

non-mechanical waves

none of them

transverse wave motion is possible in:

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Air

A mixture of NH₃and O₂

Strings

All of these

When the bob of simple pendulum is at extreme position, its K.E. will be

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maximum

minimum

zero

all of them

The wave motion set up in any medium depends upon:

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Elasticity

Inertia

Density

All of these

In compressional wave,the layer of medium having reduced pressure is called:

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Compression

Elasticity

Node

Rarefaction

With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are

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Energy, momentum and mass

Energy

Energy and mass

Energy and linear momentum

The bob of a simple pendulum is suspended by

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string

heavy inextensible string

light extensible string

light inextensible string

At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string of that instant is

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Sinusoidal shape with amplitude A/3

Sinusoidal shape with amplitude A/2

Sinusoidal shape with amplitude A

Straight line

Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at

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subsonic speed

sonic speed

super sonic speed

any one of them

Decibel is unit of

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Intensity of light

x-ray radiation capacity

sound loudness

Energy of radiation

If a freely oscillating system is subjected to an external force, then

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free vibrations will take place

the body will move with its natural frequency

forced vibrations will take place

none of them

The waves produced in a microwave oven have frequency

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2450 Hz

2450 K Hz

2450 M Hz

2450 G Hz

The time period of pendulums of different lengths would be

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same

different

both of them

none of them

In a resonance situation the amplitude of the motion may become extra ordinarily large, if

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the driving force is large

the driving force is zero

the driving force may be feeble

all of them

If we increase the length of a simple pendulum four times, its time period will become

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2 times

3 times

4 times

6 times

In the same medium, velocity of the wave:

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Goes on increasing

Remains constant

Goes on decreasing

None of these

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Physics ECAT Pre Engineering Chapter 8 Waves Online Test MCQs With Answers

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