Question # 1

In liquids and gases the current is due to the motion of:

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Negative charges

Positive charges

Both positive and negative charges

None of these

The intensity level of train siren is:

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150 dB

100 dB

130 dB

120 dB

Angle opposite to the base of triangle of prism is called:

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angle of incidence

angle of refraction

angle of prism

emerging angle

Totally reflecting prism is used in:

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Periscope

Binoculars

Periscope and binocular

Telescope

The colour of live wire is:

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Black or blue

Green or yellow

White or grey

Red or brown

According to coulomb’s law, what happens to the attraction of two oppositely charged objects as their distance of separation increases:

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Increases

Decreases

Remains unchanged

Cannot be determined

Which is an example of a longitudinal wave:

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Sound wave

Light wave

Radio wave

Water wave

A data storage device is.

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Printer

Hard disk

Monitor

CPU

Unlike charges always:

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Repel each other

Attract each other

Sometimes repel and attract each other

Both A and B

The S.I unit of electric current is:

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Volt

Ampere

Coulomb

Watt

Wave equation is defined as:

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f = Tλ

f = V λ

V = 2fλ

V = fλ

Public address system is the example of :

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Analogue electronics

Digital electonics

Binary system

None of these

The refracted light striking to the side of prism is called:

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Refracted ray

Incident ray

Reflected ray

Emergent ray

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