Question # 1

The speed of sound of water at 25 ^oC is:

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1530 ms^-1

1531 ms^-1

1560 ms^-1

1570 ms^-1

Which component is output device of computer:

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CPU

C.D

Keyboard

Monitor

Which is an example of a longitudinal wave?

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Sound wave

Light wave

Radio wave

Water wave

The speed of sound was accurately measured in:

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1736

1737

1738

1739

The sound waves are the example of:

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Longitudinal waves

Transverse waves

Electromagnetic waves

x-rays

At mean position kinetic energy of the ball is:

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Minimum

Zero

Maximum

10 J

the water waves after striking the hurdle will:

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reflect

refract

diffract

all a b and c

If the displacement in spring is ‘x’ of mass “m” attached with a spring then restoring force is:

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F=ma

F=kx

F=-kx

F= m/a

What is fitted in telephone receiver:

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Electromagnet

Diaphragm

Both a and b

None

Pitch of sound depends upon:

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Frequency

Amplitude

Intensity

Time period

High pitch means:

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High wavelength

High frequency

High time period

High energy

The speed of sound is air at 21 ^oC is:

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336 ms^-1

343 ms^-1

430 ms^-1

470 ms^-1

In simple pendulum motion, restoring force is provided by:

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Air resistance

Tension in the string

Inertia

Weight of the body

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