Question # 1

Electric field lines:

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always cross each other

never cross each other

cross each other inthe region of strong field

cross each other in the region of weak field

What is fitted in telephone receiver:

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Electromagnet

Diaphragm

Both a and b

None

Which is used to investigate the properties of electron beam:

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LDR

Electroscope

Proton gun

Electron gun

Electronics is a branch of:

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Mass

Applied Physics

Mechanics

Nuclear Physics

One byte is equal to:

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7 bits

5 bits

8 bits

9 bits

What happens to the intensity or the brightness of the lamps connected in series as more and more lamps are added:

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Increases

Decreases

Remains the same

Cannot be predicted

The S.I unit of Spring constant is:

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Nm

N

Nm-1

Ns

Battery converts chemical energy into which energy:

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Mechanical

Electrical

Thermal

None of these

with the increase in temperature the resistance of pure metals:

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increases

decreases

remains same

none of these

Unlike charges always:

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Repel each other

Attract each other

Sometimes repel and attract each other

Both A and B

One coulomb is equal to charge of electrons:

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6.25x10^-19

6.25x10¹⁹

6.25x10¹⁸

6.25x10^-18

The mirror whose outer surface is reflecting is called:

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Concave mirror

Convex mirror

Mirror

Lens

Which of the following characteristic of a wave is independent of the others .

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speed

frequency

amplitude

wavelength

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