Question # 1

The temperature at which the speed of sound becomes double as was at 27°C is

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273°C

0°C

927°C

1027°C

The velocity of sound is greatest in

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Water

Air

Vacuum

Metal

Acceleration of the mass at any instant is given by

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a=k/m x

a= - m/k x

a = - k/m x

a=m/k x

Which of the following is an example of a S.H.M?

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motion of a projectile

motion of a train along a circular path

motion of swing

electrons revolving sound the nucleus

Which one of the following wave motions is transverse:

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Wave motion produced in water when a piece of stone is thrown into it

Pulling of weight hanging vertically with a spiral spring

Both of these

None of these

The bob of a simple pendulum is suspended by

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string

heavy inextensible string

light extensible string

light inextensible string

If F=0.04 N and X=4 cm then K=

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1 Nm^-1

2 Nm^-1

3 Nm^-1

4 Nm^-1

When a body is performing S.H.M., its acceleration is

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inversely proportional to the displacement

directly proportional to the applied force

directly proportional to the amplitude

directly proportional to the displacement but in opposite direction

A swing has

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one natural frequency

two natural frequencies

three natural frequencies

four natural frequencies

Which of the following is the longitudinal waves?

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Sound waves

Waves on plucked string

Water waves

Light waves

A physical system under going forced vibrations is known as

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Simple harmonic oscillator

Compound harmonic oscillator

Physical harmonic oscillator

driven harmonic oscillator

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

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Increasing by a factor of 2

Decreasing by a factor of 2

Decreasing by a factor of 4

Unchanged

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

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

When a body is pulled away from its rest or equilibrium position and then released, the body oscillates due to

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applied force

momentum

restoring force

none of them

Transverse waves can be set up:

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Solids

Liquids

Gases

All of them

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

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