Question # 1

Which of the following is a brain of computer?

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Central processing unit

Mouse

Monitor

Hard disc

The major function of electronic devices is to amplify the ........ signals.

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Stronge electric

Semi strong electric

Both a and c

weak electric

Revolutionary charges have occur in last ............. years.

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30

40

50

60

Which of the following are electromagnetic waves:

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sound

water waves

Ultrasound

light

The deficiency of elctrons in outermost shell of silicon atom is called.

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Valent shell hole

Doping

Hole

None of these

in binary system. 37 is written as.

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101101

100101

110011

101011

The substances through which current con not pass are called:

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Semi - conductors

Insulators

conductors

non - metal

analogue signal is recorded on.

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Magnetic tape

Floppy disk

Hard Disk

C.D

How many electrons Guns are used in colour T.V?

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One

Two

Three

Four

Digital singles are represented by;

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zero and 1

zero and 10

1 and 2

o and 9

Electric signal is converted into digital signal by.

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Key board

Monitor

Scanner

Modem

Diodes are used to.

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Convert A.C. into D.C

Convert D.C into A.C

Store Charge

Change voltage

the number of (101)₁₀ in decimal is equal to .......... inbinary.

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0101111

0000101

10101101

1100101

The substances through which current can pass easily are called:

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conductors

insulators

Semi - conductors

Non - Electrolytes

Word FAX is short form of.

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Facsiline

Facsimile

Fasimile

None of these

The elements used to increase the number of free electrons in the semi - conductor belong to:

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2^nd group

3^rd group

4^th group

5^th group

English word "9" has been divided into ............ segments.

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5

6

7

8

Which of the following is an input device:

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key board

printer

monitor

CPU

The number of hovering satellites which can send transmissions to all over the world:

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one

Two

Three

Four

Operation " 2+3" in computer performed by.

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CU

CPU

ALU

None of these

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General Science 10th Class English Medium Chapter 9 Online Test MCQs With Answers

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