Question # 1

Reverse current flows due to

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Majority charge carriers

Minority charge carriers

Electrons

Holes

For normal transistor the emitter current can be given by

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I_E = I_C

I_E = I_C + I_B

I_E = I_B

None of these

A transistor has:

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Two regions

Three regions

Single regions

Four regions

Greater concentration of impurity is added in.

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Base

Emitter

Collector

LED

Logic gate can control some physical parameters like.

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Temperature, Pressure

Resistance, Inductance

Capacitance, Impedance

Current, voltage

The device which is used as amplifier and works with the negative feedback is.

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Operational amplifier

P-n-p transistor

n-p-n transistor

Transistor

For rectification we use.

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Transformer

Diode

Choke

Generator

The open loop gain of the amplifier is order of.

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10⁶

10⁵

10⁷

10³

The mathematical symbol for NOR operation is

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X = A . B

X = A + D

In an N-type silicon, which of the following statement is true?

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Electrons are majority carriers & trivalent atoms are the dopants

Electrons are majority carriers & pentavalent atoms are the dopants

Holes are minority carriers & pentavalent atoms are the dopants.

Holes are minority carriers & trivavalent atoms are the dopants.

A photo diode can turn its current ON and OFF in

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Micro seconds

Mega seconds

Nano seconds

Mili seconds

A two inputs NAND gat with inputs a and b has an output '0' if.

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B is zero

A is zero

Both A and B are 1

Both A and B are '0'

One use of a single p-n junction semiconductor in an electrical circuit is a

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Rectifier

Transistor

Battery

Diode

Which component of the transistor has greater contrition of impurity.

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Base

Emitter

Collector

Emitter and collector

The output from a full wave rectifier is

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An ac voltage

A dc voltage

Zero

A pulsating unidirectional voltage

The P.D develop in case of germanium is:

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0.3

0.7

0.5

0.9

When a PN-Junction is reverse biased the depletion region is.

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Widened

Narrowed

Normal

None of these

The sensor of light is.

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Transistor

LED

Diode

Light dependent resistance

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