Question # 1

X=A+B is the mathematical notation for.

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OR gate

NOR gate

NAND gate

AND gate

Doping is made comparatively larger in

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Emitter

Base

Collector

P -type semi conductor

Which factor does not affect the conductivity of PN-Junction diode.

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Doping

Temperature

Voltage

Pressure

In full wave rectification number of diodes required are equal to.

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2

3

4

5

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

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Rectifier

Transistor

Battery

Diode

The resistance between the inverting (-) and non inverting inputs is called Input resistance and is the order of.

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Ohms

Kilo Ohms

Mega Ohms

Thounds Ohms

Most of the electrons in the base of an NPN transistor flow:

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Out of the base lead

Into the collector

Into the emit

Into the base supply

The semi conductor diode has the property of

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Two way conduction

Zero conduction

One way conduction

Amplification

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

Which is not fundamental logic gate.

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NOT

AND

OR

NAND

The potential difference across the depletion region of germanium is.

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0.3 V

0.5 V

0.7 V

0.8 V

Photo diode is used for detection of.

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Heat

Magnet

Current

Light

For normal use:

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Emitter base function is reversed biased

Collector base junction is reserved biased

Emitter base junction is forward biased

Both c and b

A PN junction can not be sued a.

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Rectifier

Amplifier

Detector

LED

Which one has greater cone of impurity among all:

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Emitter

Base

Collector

All are pure

The colour of light emitted by a LED depends on.

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It forward biased

Its reverse biased

Unbiased

None of these

Base of transistor is of order:

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10^-11m

10⁶m

10^-8m

10^-6m

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Physics ICS Part 2 Chapter 18 Online MCQ's Test MCQs With Answers

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