Question # 1

Two sound waves of slightly different frequencies propagating in the same direction produce beats due to

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Interference

Diffraction

Polarization

Refraction

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

The time period of pendulums of different lengths would be

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same

different

both of them

none of them

The waves which propagate through the oscillations of material particles are known as:

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Mechanical waves

Electromagnetic waves

Any of them

None of them

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

In stationary waves

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Energy is uniformly distributed

Energy is minimum at nodes and maximum at antinodes

Energy is maximum at nodes and minimum at antidotes

Alternating maximum and minimum energy producing at nodes and antinodes

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

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330

1000

156

0

In transverse waves, the individual particles of the medium move:

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In circles

Perpendicular to the direction of level

Parallel to the direction of level

None of these

The frequency of free vibrations is known as

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free frequency

forced frequency

natural frequency

un-natural frequency

There is no net transfer of energy by particle of medium in

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Longitudinal wave

Transverse wave

Progressive wave

Stationary wave

The distance covered by the wave during one period is called its:

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Wave number

Frequency

Wavelength

Time period

Transverse waves can be set up:

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Solids

Liquids

Gases

All of them

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

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

If the length of second pendulum becomes four times then its time period will become

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Four time

Two times

Six times

Eight times

A simple pendulum consists of a

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small light bob

small heavy bob

big light bob

big heavy bob

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