Question # 1

Radio waves are:

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Electric waves

Electromagnetic waves

X-rays

Radio active ways.

The substances which do not have free electrons are called:

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None of these

Insulators

Conductors

Semiconductors

Which is the best material for making connecting wires:

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Iron

Copper

Tungsten

Nickel

What is fitted in telephone receiver?

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Electromagnet

Diaphragm

Both a and b

None of these

A paper capacitor is usually available in the form of:

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Tubes

Rolled foil

Disc

Plates

The device which is used to convert sound waves into electrical signal is called:

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Ear piece

Microphone

Transmission channel

Receiver

The phenomena used in capacitor is:

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electrostatic induction

induced current

electric field

electroscope

Which is the unit of energy:

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KWh

Electron volt

Joule

All of above

F=

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qE

q-E

q/E

q+E

Which statement of the following is false for primary memory?

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The base of primary memory is electronics

This is a random access memory

It gets lost when computer switches off

It is built on laser technology

A parallel circuit is also used as a divider for:

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Power

Resistance

Current

Voltage

Which of the following reasons increase the importance of computer?

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Speedy

Long time storage of memory

Quick decision

All of these

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Physics 10th Class English Medium Unit 8 Online Test MCQs With Answers

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