Question # 1

At mean position kinetic energy of the ball is:

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Minimum

Zero

Maximum

10 J

The waves in which particles of the medium vibrate perpendicular to the direction of waves are:

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Electromagnetic waves

Sound waves

Both a and b

Transverse waves

The unit of intensity of sound:

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wm^-1

wm

wm^-2

wm^-3

Information storage device work on the principles of:

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Heat

Sound

Light

Magnetism

To hear echo, the distance between the observer and the obstacle is 17m then how much distance will the sound travel?

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60m

54m

17m

34m

the motion in which the friction reduces the mechanical energy of the system as time passes and the amplitude of motion reduces is called:

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SHM

Random motion

Damped motion

Circulatory motion

The energy is transferred from one place of another:

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through matter

through waves

both a and b

through vacuum

When frequency of sound wave is increased, which of the following decreases?

i) Wavelength ii) Period iii) Amplitude

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i only

(iii) only

i and ii only

i and iii only

What is fitted in telephone receiver:

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Electromagnet

Diaphragm

Both a and b

None

The speed of sound in the air at one atmospheric pressure at room temperature is:

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343 ms-1

346 ms-1

349 ms-1

339 ms-1

Coaxial cable are used to transmit signals:

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Magnet

Electric

Mechanical

Both mechanical and magnet

To hear echoes, the minimum distance of the obstacle from source of sound should be:

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10 m

15 m

17 m

20 m

the distance between two consecutive trough or crest is called:

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wavelength

frequency

time period

amplitude

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