Question # 1

The waves which propagate out in space due to oscillation of electric and magnetic fields are known as

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e.m. waves

mechanical waves

sound waves

water waves

At 'resonance' the transfer of energy from deriving source to the oscillator is

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maximum

minimum

zero

none of them

The distance covered by the wave in one second is:

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Wave number

Wave length

Frequency

Wave speed

The waves which propagate by the collision of material particles are known as

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e.m. waves

mechanical waves

light waves

microwaves

Waves transport energy

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without transport energy

with matter

both of them

none of them

The velocity of sound in air not effected by changes in

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Moisture contents in air

Temperature of air

The atmosphere pressure

The composition of air

Mechanical waves on the surface of a liquid are

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Transverse

Longitudinal

Torsional

both transverse and longitudinal

One complete round trip of the body about its mean position is called

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displacement

vibration

a complete motion

an acceleration

In case of mechanical waves, we study the motion of

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a single particle

collection of particle

any one of them

none of them

When a mass 'm' is pulled slowly, the spring stretches by an amount x₀,then the average force would be

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F= Kx₀

F=1/2Kx₀

F=2Kx₀

F=4Kx₀

A weakly damped system has fairly

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sharp resonance curve

flat resonance curve

both of them

none of them

Velocity of sound in vacuum (in m/s) is

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330

1000

156

0

The velocity of sound is greatest in

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Water

Air

Vacuum

Metal

When two waves with same frequency and constant phase difference phase difference interfere

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There is a gain of energy

There is a loss of energy

The energy is redistributed and the distribution changes with time

The energy is redistributed and the distribution remains constant with time

Such oscillations in which the amplitude decreases steadily with time, are called

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resonance

force oscillations

large oscillations

damped oscillations

The restoring force always directed towards the

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extreme position

mean position

both of them

none of them

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