Question # 1

The sound waves are the example of:

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Longitudinal waves

Transverse waves

Electromagnetic waves

x-rays

Electric field lines were introduced by:

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Faraday

Newton

Coulomb

Joule

The commercial unit of electrical energy is:

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Joule

Watt

Kilowatt hour

Electron volt

From which of the following you can get information almost about everything?

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Book

Teacher

Computer

Internet

Which device has two coils, primary and secondary?

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D.C. Motor

Transformer

A.C. genrator

a and b

In computer terminology information means.

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any data

raw data

processed data

large data

The sound level of rustling of leave is:

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1 dB

20 dB

30 dB

10 dB

A 3Ω resistor having 2A current will dissipate the power of:

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12W

4W

6W

8W

The value of acceleration in simple harmonic motion at mean position is

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Maximum

Zero

10 N

Both a , b

Radio waves are:

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Longitudinal waves

Transverse waves

Electromagnetic waves

All of these

The instrument which is used to display the magnitude of changing electric current is called:

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Evacuated tube

Cathode rays oscilloscope

Television tube

Picture tube

The principal focus of a concave mirror is:

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Virtual

Real

Imaginary

Dual aspect

At room temperature, electrons cannot escape the metal surface due to ………….. of atomic nucleus:

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Repulsive forces

Attractive forces

Gravitational forces

Electromagnetic forces

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