Question # 1

Astronauts is space need to communicate with each other by radio links because:

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Sound waves travel very slowly in space.

Sound waves travel very fast in speace

Sound waves cannot travel in space

Sound waves have low frequency in space

The waves, which are used to detect the broken bones are called:

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Light waves

x-rays

sound waves

both b and c

the waves have properties:

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reflection

refraction

diffraction

all of these

The speed of sound in iron at 25 ^oC is ms^-1

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5950

5900

6950

6940

If the mass of bob of a simple pendulum is doubled, its time period:

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Is doubled

Becomes four times

Remains same

Becomes half

Information storage device work on the principles of:

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Heat

Sound

Light

Magnetism

Which form of energy is sound?

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Electrical

Mechanical

Thermal

Chemical

1 GB =

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1022MB

1023 MB

1024MB

1025MB

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

The difference between the loudness of faintest audible sound and loudness of another sound is called:

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Pitch of sound

Quality of sound

Sound level

Intensity of sound

The maximum displacement from mean position is called:

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Maximum height

Time period

Amplitude

Interval

High pitch means:

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High wavelength

High frequency

High time period

High energy

1 MB =

Choose an answer

1022KB

1023KB

1024KB

1025KB

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