Question # 1

The substances through which current con not pass are called:

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Semi - conductors

Insulators

conductors

non - metal

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

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Free electron

Holes

Positive ions

Heat

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

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one

Two

Three

Four

Who was the inventor of radio system.

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Grahm bell

F. Crick

Charles babbage

Marconi

Which of the following is used as rectifier;

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semi - conductor diode

resistors

capacitors

Germanium

analogue signal is recorded on.

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Magnetic tape

Floppy disk

Hard Disk

C.D

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 examples of semi - conductors:

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sodium and potassium

calcium and potassium

Germanium and silicon

carbon and nitrogen

Operation " 2+3" in computer performed by.

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CU

CPU

ALU

None of these

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

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5

6

7

8

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

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

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One

Two

Three

Four

The speed of radio wave is:

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Light

Air

Sound

Rocket

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

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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