Question # 1

The unit of intensity of sound:

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Wm^-1

Wm^-2

Wm

Wm²

If we double the distance between two charges, then force becomes

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4-times

1/4th

Double

Half

The 1st practical electric battery is known as:

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Voltaic

Pile

Voltaic pile

Voltaic cell

Two uncharged objects A and B are rubbed against each other. When object B is placed near a negatively charged object C, the two objects repel each other. Which of these statements is true about object A.

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Remains uncharged

Becomes positively charged

Becomes negatively charged

Unpredicatable

Electric field lines of force were first introduced by:

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Ampere

Farady

Fleming

Coulomb

Intensity level of the sound produced by mosquito buzzing is:

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70 dB

40 dB

10 dB

120 dB

One coulomb is equal to charge of ________ electrons.

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6.25 x 10^-19

6.25 x 10¹⁹

6.25 x 10¹⁸

6.25 x 10^-18

How many tubes or electron guns used in a colour television set:

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Two

Four

Five

Three

When you rub a plastic rod against your hair several times and put it near some bits of paper, the pieces of papers are attracted towards it. What does this observation indicate?

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the rod and the paper are oppositely charged

the rod acquires a positive charge

the reod and the paper have the same charges

the rod acquires a negative charge

Unlike charges always:

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Repel each other

Attract each other

Sometimes repel and attract each other

Both A and B

Capacitance is defined as:

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VC

Q/V

QV

V/Q

Bats can hear sound of frequency up to:

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100,000Hz

25000Hz

120, 000Hz

1000Hz

The intensity level of whispering is:

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20 dB

30 dB

40 dB

50 dB

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