Question # 1

In P-type semi -conductior, most of the current is due to.

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Free electron

Holes

Positive ions

Heat

The examples of semi - conductors:

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sodium and potassium

calcium and potassium

Germanium and silicon

carbon and nitrogen

In Pure -semi conductors no free electrons are available to conduct electric current at.

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Ordinary temperature

Low temperature

High temperature

None of these

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

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One

Two

Three

Four

Word"Computer" is derive from.

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Machine

Calculator

Compute

All of these

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

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30

40

50

60

Electric signal is converted into digital signal by.

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Key board

Monitor

Scanner

Modem

Purose of electron gun in TV is to.

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Fire electron

Receive electron

Consume electron

Display picture

in binary system. 37 is written as.

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101101

100101

110011

101011

The numebr (100)16 in decimal is equal to............. in binary.

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1110100

01011101

1100100

1001001

Word FAX is short form of.

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Facsiline

Facsimile

Fasimile

None of these

Which of the following is a brain of computer?

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Central processing unit

Mouse

Monitor

Hard disc

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

Which disk consisting of metal plates for recording.

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Floopy

RAM

HARD

CD

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

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0101111

0000101

10101101

1100101

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 frequency of the carrier waver used of radio transmission:

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30 KHZ

40 KHZ

50 KHZ

60 KHZ

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

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one

Two

Three

Four

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

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Valent shell hole

Doping

Hole

None of these

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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