Question # 1

Diodes are used to.

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Convert A.C. into D.C

Convert D.C into A.C

Store Charge

Change voltage

in binary system. 37 is written as.

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101101

100101

110011

101011

Which of the following is used as rectifier;

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semi - conductor diode

resistors

capacitors

Germanium

Which of the following are electromagnetic waves:

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sound

water waves

Ultrasound

light

Word"Computer" is derive from.

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Machine

Calculator

Compute

All 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 of the following is an input device:

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key board

printer

monitor

CPU

Which disk consisting of metal plates for recording.

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Floopy

RAM

HARD

CD

analogue signal is recorded on.

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Magnetic tape

Floppy disk

Hard Disk

C.D

Operation " 2+3" in computer performed by.

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CU

CPU

ALU

None of these

Digital singles are represented by;

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zero and 1

zero and 10

1 and 2

o and 9

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

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0101111

0000101

10101101

1100101

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

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30

40

50

60

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