Question # 1

Which is not fundamental logic gate.

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NOT

AND

OR

NAND

The gate, which changes the logic level to its opposite level is called

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NOR gate

AND gate

OR gate

NOT gate

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

Doping is made comparatively larger in

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Emitter

Base

Collector

P -type semi conductor

A diode characteristic curve is a plot between

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Current and time

Voltage and time

Voltage and current

Forward voltage and reverse voltage

Light emitting diodes are made from semiconductors.

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Silicon

Germanium

Carbon

Gallium arsenide

Automatic function of street light can be done by the use of.

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Inductor

Rectifier

Comparator

emf

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

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

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Rectifier

Transistor

Battery

Diode

The chargeless region after formation of Pn junction is called:

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Free region

Depletion region

Field region

U.V region

When transistor are used in digital circuits they usually operate in the :

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Active region

Break down region

Saturation & cutoff regions

Linear region

An expression for gain of an inverting amplifier is

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(R₁R₂)

None of these

A transistor has parts:

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2

3

4

5

Greater concentration of impurity is added in.

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Base

Emitter

Collector

LED

The P.D develop in case of germanium is:

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0.3

0.7

0.5

0.9

Which component of the transistor has greater contrition of impurity.

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Base

Emitter

Collector

Emitter and collector

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.

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