Question # 1

The mathematical symbol for NOR operation is

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X = A . B

X = A + D

Which one of the following bulbs has the least resistance.

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100 W

200 W

500 W

1000 W

A positive charge is moving towards an observer, The direction of magnetic induction will be.

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Toward right

Anti clockwise

Clockwise

Toward left

The colour of light emitted by a LED depends on.

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It forward biased

Its reverse biased

Unbiased

None of these

The impurity in the germinium is usually in the ratio of

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1:10⁶

1:10⁴

1:10⁸

1:10¹⁰

The domain theory of magnet is important to explain the behaviour of

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Diamagnets

Paramagnets

Ferromagnets

All of these

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None of the above

By winding the coil around a less magnetic core, self induction.

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Will increase

Will decrease

Remain same

First increase then decrease

The charge of an alpha particle is equal to

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-e

+e

-2e

2e

A charged particle having charge 'q' is moving at right angle to magnetic field. The quantity which varies is.

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Speed

Kinetic energy

Path of motion

angular velocity

Electric power:

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Vx1

V²x1

V/1

V/1²

At resonance, the behavior of R-L-C series circuit is.

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Resistive

Capacitive

Inductive

Modulative

The power factor of RL series circuit is.

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0

1

Less then 1

More than one

High frequency radio wave is called as

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Fluctuate

Carrier wave

Matter wave

Mechanical wave

An electron in H -atom is excited from ground state n=4 , How many spectral lines are possible in this case.

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6

5

4

3

Main reason for world wide use of A.C. is

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It is cheaper

Transmitted

Botha a and b

Reaches in short time

The Kirchhoff 1^st rule is manifestation of:

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Law of conservation of mass

Law of Conservation of charge

Law of conservation of energy

None of above

The electric intensity due to two oppositely charged plates is

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None of these

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