Question # 1

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.

LDR becomes necessary when op amp is used as a

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Night switch

Inverter

Comparator

Rectifier

In a certain circuit, I_{B = 40 µA,}I_C= 20 mA

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450 amp

0.45 amp

5 m amp

500 amp

NAND gate represented by:

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X = A. B

X = A+B

X= A.B

X=|A+B|

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

The average gap for Germanium at 0K is

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1.12 ev

0.02 ev

6.72 ev

7.2 ev

The colour of light emitted by a LED depends on.

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It forward biased

Its reverse biased

Unbiased

None of these

The sensor of light is.

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Transistor

LED

Diode

Light dependent resistance

Output resistance of an op amp is

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High

Low

Zero

Equal to input resistance

The input resistance of an op amplifier is.

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Low

High

Zero

Equal to output resistance

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'

The gain of transistor amplifier depends upon

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Resistance connected with collector

Resistance connected with base voltage

Input voltage

Output voltage

Photo diode detects.

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Visible light

Radio waves

X rays

All of them

Logic gate can control some physical parameters like.

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Temperature, Pressure

Resistance, Inductance

Capacitance, Impedance

Current, voltage

Which device is used as a rectifier?

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Capacitor

Transistor

Diode

Transformer

The use of LDR is in the circuit of.

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Logic gate

Rectifier

Oscillator

High Switch

Transistor was invented by:

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Bardeen

Micheal faraday

Lenz

Newton

The circuit of full wave rectification consist of

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Three diodes

Four diodes

Two diodes

One diode

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

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