Question # 1

A PN junction can not be sued a.

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Rectifier

Amplifier

Detector

LED

In a transistor, collector current is controlled by:

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Collector voltage

Base current

Collector resistance

All of the above

The term invertor is used for.

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NOR gate

XNOR gate

NAND gate

NOT gate

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 use of LDR is in the circuit of.

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Logic gate

Rectifier

Oscillator

High Switch

The gain of transistor amplifier depends upon

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Resistance connected with collector

Resistance connected with base voltage

Input voltage

Output voltage

A diode characteristics curve is a plot between

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Current and resistance

Voltage and time

Voltage and current

Current and time

the number of terminals in a semiconductor diode are

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2

3

4

5

The output voltage of a rectifier is.

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Smooth

Pulsating

Alternating

Per featly direct

Reverse current flows due to

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Majority charge carriers

Minority charge carriers

Electrons

Holes

The open loop gain of the amplifier is order of.

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10⁶

10⁵

10⁷

10³

The circuit of full wave rectification consist of

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Three diodes

Four diodes

Two diodes

One diode

LDR becomes necessary when op amp is used as a

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Night switch

Inverter

Comparator

Rectifier

Transistor was discovered by

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Young

Curie

John Bardeen

Shale's

The semi conductor diode has the property of

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Two way conduction

Zero conduction

One way conduction

Amplification

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 case of reverse biasing, current is flown due to:

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Minority charge carriers

Majority charge carriers

Electrons

Protons

A photo diode can turn its current ON and OFF in

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Micro seconds

Mega seconds

Nano seconds

Mili seconds

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

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