Question # 1

In electric motor, the brushes are made of:

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Lead

Graphite

Iron

Wood

A digital multimeter is used to measure:

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Current

Resistance

Potential difference

All of above

If a ray of light is glass is incident on an air surface at an angle greater than the critical angle, the ray will.

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refract only

reflect only

partially refract and partially reflect

Diffract only

Big unit of capacitance is:

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Farad

Volt

watt

coulomb

If Current flowing through switch then the output is expressed as:

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0

1

-1

2

The A.C. used in our houses has frequency _____ cycle/sec

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60

30

50

130

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

The S.I unit of power of a lens is:

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Dioptre

Volt

Ampere

Watt

Information storage devices work on the principles of

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Heat

Sound

Light

Magnetism

If there is divergence of leaves by touching a body with electroscope then the body is:

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Semi conductor

Neutral

charge body

Insulator

In computer terminology information means.

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any data

raw data

processed data

large data

Iron core is used in tranformer to:

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Enhance the flux

Decrease the flux

Keep flux the same

botha a and b

The mirror whose outer surface is reflecting is called:

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Concave mirror

Convex mirror

Lens

Mirror

The distance between principal focus and pole of mirror is called:

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Princpal focus

Focal length

P

Image

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