Question # 1

The current flow from p-type semi conductors is due to.

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Free electrons

Valance electrons

Doping

Hole

Diodes are used to.

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Convert A.C. into D.C

Convert D.C into A.C

Store Charge

Change voltage

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

Which of the following are electromagnetic waves:

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sound

water waves

Ultrasound

light

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

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1110100

01011101

1100100

1001001

Electric signal is converted into digital signal by.

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Key board

Monitor

Scanner

Modem

The examples of semi - conductors:

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sodium and potassium

calcium and potassium

Germanium and silicon

carbon and nitrogen

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

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0101111

0000101

10101101

1100101

analogue signal is recorded on.

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Magnetic tape

Floppy disk

Hard Disk

C.D

Which disk consisting of metal plates for recording.

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Floopy

RAM

HARD

CD

Which of the following is a brain of computer?

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Central processing unit

Mouse

Monitor

Hard disc

Operation " 2+3" in computer performed by.

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CU

CPU

ALU

None of these

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

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Valent shell hole

Doping

Hole

None of these

Which of the following is used as rectifier;

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semi - conductor diode

resistors

capacitors

Germanium

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

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5

6

7

8

Which element is used to make LED?

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Aluminum

Calcium

sodium

Arsenic

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

Purose of electron gun in TV is to.

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Fire electron

Receive electron

Consume electron

Display picture

Hovering satellite completes its rotation in 24 hours at the height of:

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360 km

3600 km

36000 km

360000 km

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

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