Question # 1

The basic circuit element in A.C. circuit which controls current.

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Resistor only

Capacitor only

Inductor only

All of these

In AC system we generate sine wave form because:

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It san be easily draw

It produces least disturbance in electrical circuits

It is nature standard

Other waves cannot be produced easily

Donor impurities are

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Germanium, silicon

Indium, galium

Antimony, arsenic

Diamond, carbon

In glass, molecules are irregularly arranged so it is known as.

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Solid

Liquid

Solid liquid

Gas

The flow of D.C current is opposed by

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Resistor

Induction

Capacitor

All of these

Unit (S.I) of temperature coefficient of resistivity of a material is

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K

K^-1

^oC

K^-2

Energy stored in an inductor is:

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1/2L²I

1/2L²/I

_1/2LI²

1/2LI

Which particle has larger range in air.

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Alpha rays

Gama rays

Beta rays

Neutron

the substances in which the atoms do not form magnetic dipoles are called.

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Diamagnetic

Para magnetic

Ferro magnetic

Crystal

Commutator was invented in

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1834

1820

1840

1835

The current induced can be increased by:

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Using a stronger magnetic field

Moving the loop faster

Replacing the loop bay coi of many turns

All of above

The charge of an alpha particle is equal to

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-e

+e

-2e

2e

If a step up transformer were 100% efficient the primary and secondary winging's would have the same.

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Current

Power

Voltage

Direction of winding

Antiparticle of electron is.

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proton

Photon

Positron

Neutron

Albert Einstein got noble prize for service in:

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Pair production

Annihilation of matter theory

Compton effect

Photoelectric effect

The radioactive decay obeys the law

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For accurate measurement of current through a circuit, the resistance of ammeter should be

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Very small

Very high

Neither small nor high

None of the above

Which series lies in the ultraviolet region.

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Balmer series

Bracket series

Ptund series

Lyman series

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