Question # 1

The symbol of p-n-p transistor is

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the number of terminals in a semiconductor diode are

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2

3

4

5

Logic gate can control some physical parameters like.

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Temperature, Pressure

Resistance, Inductance

Capacitance, Impedance

Current, voltage

The ratio Beta in transistor is called.

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Voltage gain

Emitter gain

Current gain

Nuclear gain

A device which converts low voltage or current to high voltage or current is called.

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Transformer

AC generator

Amplifier

Rectifier

A PN junction can not be sued a.

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Rectifier

Amplifier

Detector

LED

OR gate is represented by:

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X = A+B

X=A.B

X=A+B

X=A.B

Truth table of logic function.

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Summarize its output values only

Tabulates all its input conditions only

Display all its input and output possibility

Is not base on logic algebra

The chargeless region after formation of Pn junction is called:

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Free region

Depletion region

Field region

U.V region

Minimum number of semi conductor diodes required for full wave rectification are.

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1

2

3

4

In a transistor, collector current is controlled by:

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Collector voltage

Base current

Collector resistance

All of the above

During negative half cycle of A.c then p-n junction offers.

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High resistance

Low resistance

No resistance

All of these

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.

In photovoltaic cell, current is directly proportional to.

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Wavelength of light

Intensity of light

Energy

Frequency of light

Improper bisting of a transistor circiut produces:

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Heavy loading of emitter current

Distortion in the output output signal

Excessive heat at collector terminal

Faculty location of load line

The average gap for Germanium at 0K is

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1.12 ev

0.02 ev

6.72 ev

7.2 ev

For rectification we use.

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Transformer

Diode

Choke

Generator

The p-n junction in which p side is connected to+ive and n-side is -ve the junction is said to be:

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Neutral

Forward biased

Reversed biased

None of above

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