Question # 1

the distance between two consecutive trough or crest is called:

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wavelength

frequency

time period

amplitude

An electric current in conductors is due to the flow of:

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Positive ions

Negtive ions

Positive charge

free electron

The symbol of AND operation is:

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+

-

.

*

Specific resistance of silver = ________ x 10^-sOhm-meter

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5.25

2.75

1.69

1.62

If the length of a simple pendulum is halved its time period will become:

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T/2

T = T/√2

√2T

2T

After how much time the echo must be heard?

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0.1 s

0.10 s

0.20 s

0.50 s

Pitch of sound depends upon:

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Frequency

Amplitude

Intensity

Time period

What is the direction of the magnetic field lines inside a bar magnet?

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From north pole to south pole

From south pole to north pole

From side to side

There are no magnetic field lines.

The refractive index of ice is:

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1.00

1.33

1.31

2.42

In variable capacitor, dielectric medium is:

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Paper

Air

Mica

Ceramic

The relation between v,f andλ of a wave is:

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vf=λ

fλ = v

vλ =f

v=λ/f

Level of noise recommended in eight, hour work day:

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80-90 dB

80-85- dB

85-90 dB

90-95 dB

Coaxial cable are used to transmit signals:

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Magnet

Electric

Mechanical

Both mechanical and magnet

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