Question # 1

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

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One

Two

Three

Four

Purose of electron gun in TV is to.

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Fire electron

Receive electron

Consume electron

Display picture

Diodes are used to.

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Convert A.C. into D.C

Convert D.C into A.C

Store Charge

Change voltage

Electric signal is converted into digital signal by.

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Key board

Monitor

Scanner

Modem

Which of the following are electromagnetic waves:

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sound

water waves

Ultrasound

light

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

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30

40

50

60

Operation " 2+3" in computer performed by.

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CU

CPU

ALU

None of these

Which of the following is a brain of computer?

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Central processing unit

Mouse

Monitor

Hard disc

Which of the following is an input device:

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key board

printer

monitor

CPU

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

The speed of radio wave is:

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Light

Air

Sound

Rocket

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

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Valent shell hole

Doping

Hole

None of these

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

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one

Two

Three

Four

analogue signal is recorded on.

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Magnetic tape

Floppy disk

Hard Disk

C.D

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

Word FAX is short form of.

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Facsiline

Facsimile

Fasimile

None of these

Who was the inventor of radio system.

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Grahm bell

F. Crick

Charles babbage

Marconi

in binary system. 37 is written as.

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101101

100101

110011

101011

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

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5

6

7

8

The substances through which current can pass easily are called:

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conductors

insulators

Semi - conductors

Non - Electrolytes

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

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