Question # 1

The e/m of a neutron is

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Less than electron

The same as electron

Zero

Greater than election

Electric flux is a:

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Scalar quantity

Vector quantity

Variable quantity

None of these

A charged conductor has charge on its.

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Inner surface

Outer surface

Middle surface

Surrounding space

The expression P = VI hold only when current and voltage are.

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In phase

Out of phase

At right angle to each other

At angle of 120 ^o

A rheostat can operate as.

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Amplifier

Potential divider

Oscillator

Transformer

Photo electrons are emitted y using visible light when the metal is.

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sodium

Copper

Nicked

Cobalt

When an electron in an atom goes from a lower to higher orbit its:

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K.E increases , P.E decreases

K.E increases , P.E increases

K.E decreases , P.E increases

K.E decreases , P.E decreases

The device which allows only the flow of D.C. is.

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Capacitors

transformer

Inductor

Generator

Which is not true for X rays

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X rays are not defected by electric field

X rays are polarized

X rays consist of electromagnetic waves

X rays can be diffracted by grating

The number of neutron present in a nucleus in a given by

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N = A+Z

N = A- z

N = Z - A

N = A X Z

Energy stored in inductor is.

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1/2 L I²

1/2 LI

1/2 L2I

1/2 L2I2

In order to increase sensitivity of galvanometer the value of C may be

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Increase

Decrease

Neither increase nor decrease

Remain same

Presence of dielectric always.

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Increase the electrostatic force

Reduces the electrostatic force

Do not effect electrostatic force

Doubles the electrostatic force

The ratio Beta in transistor is called.

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Voltage gain

Emitter gain

Current gain

Nuclear gain

Out of the following which material is brittle.

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Wrought iron

Copper

Tungsten

High steel carbon

Which of the following has least hysteresis loop area.

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Steel

Wrought Iron

Soft Iron

Cobalt

Compton shift is maximum for scattering angle of photon

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0^o

90^o

180^o

45^o

For automatic Switching of streetlight, the op amplifier is used as.

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Inductor

Converter

Comparator

Thermistor

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