Question # 1

The 1st practical electric battery is known as:

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Voltaic

Pile

Voltaic pile

Voltaic cell

Unlike charges always:

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Repel each other

Attract each other

Sometimes repel and attract each other

Both A and B

The SI unit of electric field intensity is:

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NC-2

NC-1

Ns

Nm-1

A positive and negative charges are initially 4 cm apart. When they are moved closer together so that they are now only 1 cm apart, the force between them is:

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4 times smaller than before

4 times larger than before

8 times larger than before

16 times larger than before.

To hear echoes, the minimum distance of the obstacle from source of sound should be:

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10m

15m

17m

20m

Who developed the 1st practical electric battery:

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Alessandro volta

Faraday

Newton

None of these

Intensity level of the sound produced by mosquito buzzing is:

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70 dB

40 dB

10 dB

120 dB

If we double the distance between two charges, what will be the change in the force between them?

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Half

Double

One fourth

Four times

The S.I unit of electric potential is:

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Watt

Joule

Coulomb

Volt

The speed of sound in are water at 25°C is:

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1530ms-1

1531ms-1

1560ms-1

1570ms-1

Sound waves having frequency higher than 20,000 Hz are called:

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Ultrasonic

Infrasonic

Audible

Echo

Ultrasound waves carry energy:

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Less

More

Equal

None of these

The pitch of a sound is most closely related to its:

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Wave form

Period

Amplitude

Frequency

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Physics 10th Class English Medium Unit 4 Online Test MCQs With Answers

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