Question # 1

The maximum displacement from mean position is called:

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Maximum height

Time period

Amplitude

Intervel

In CD presence of pits is indicated by:

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0

2

3

1

the distance between two consecutive trough or crest is called:

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wavelength

frequency

time period

amplitude

Two uncharged objects A and B are rubbed against each other. When object B is placed near a negatively charged object C, the two objects repel each other. Which of these statements is true about object A.

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Remains uncharged

Becomes positively charged

Becomes negatively charged

Unpredicatable

Which is an example of a longitudinal wave:

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Sound wave

Light wave

Radio wave

Water wave

Digital technology is used in:

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Bulb

Radar

Electric motor

All of these

The speed of sound in air at 0°C is:

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331ms^-1

376ms^-1

231ms^-1

386ms^-1

The S.I unit of intensity of sound is:

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Wm

Wm2

Wm-2

Wm-1

The output of a two input NOR gate is 1 when:

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A is 1 and B is 0

A is 0 and B IS 1

Both A and B are 0

Both A and B are 1

The oscillations of a system in the presence of which force are called damp oscillations:

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Resistive force

Attractive force

Coulomb force

Both a and b

Which of the following characteristic of a wave is independent of the others .

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speed

frequency

amplitude

wavelength

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

Which of the following quantities is not change during refraction of light?

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Its direction

Its speed

its frequency

Its wavelength

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