Question # 1

A wave, which transfer energy by moving away from the source of disturbance is called a

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progressive wave

travelling wave

both of them

none of them

The velocity of sound in air depends upon

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Density and elasticity of gas

Pressure

Wavelength

Amplitude and frequency of sound

Which one of the following is an example of resonance

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swing

tuning a radio

microwave oven

all of them

The process in which energy is dissipated from the oscillating system is known as

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resonance

interference

diffraction

damping

SI unit of wave length is:

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Kilometer

Metre

Centimetre

Hertz

A heavily damped system has a fairly

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sharp resonance curve

flat resonance curve

both of them

none of them

The expression for restoring force is

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F=ma

F=kx

F= -kx

Kx=ma

If the length of a simple pendulum is 0.25 m its time period would be

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1.0 s

2.0 s

3.0 s

4.0 s

In the production of beats by 2 waves of same amplitude and nearly same frequency, the maximum intensity to each of the constituent waves is

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Same

2 times

4 times

8 times

The damping depends upon the

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amplitude

sharpness

both of them

none of them

The natural frequency of a pendulum which is vibrating freely, depends upon its

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mass

length

material

all of them

Which one of the following elasticizes is possessed by fluids:

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Young's elastic modulus (length)

Bulk elastic modulus (volume)

Modulus of rigidity (shape)

None of these

When a body moves to and fro motion, this type of motion is called

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translatory motion

circular motion

oscillatory motion

all of them

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

Si units of time period is

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second

hertz

revolution

vibration/sec

A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is

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2 m

1 m

0.5 m

4 m

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