Question # 1

Information storage device work on the principles of:

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Heat

Sound

Light

Magnetism

The voltage is decreased by:

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Step-up transformer

Step-down transformer

A.C. generator

D.C. Motor

In compound microscope, the objective have focal length than eye-piece:

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Smaller

Larger

Equal

Equal and larger

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

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Increases

Decreases

Remains the same

Can not be predicted

The amount of current that can be felt is:

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1A

0.1A

0.001 A

2A

In totally reflecting prism one angle is of:

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45°

90°

180°

120°

Optical fibers work on the principle of:

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Refraction

Reflection

Total internal reflection

Diffraction

If a neutral body is brought near to the electroscope its leaves:

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Diverge

Contract

Shut

Remain in normal position

The temperature at the centre of sun is.

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10 million k

20 million k

30 million k

35 million k

The cathode ray oscilloscope consists of main parts:

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Two

Three

Four

Five

Power of electric heater is:

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1500W

4750W

100W

50W

The half -life of carbon is

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5730 years

5700 years

5720 years

572 years

Mathematical formula of capacitance of a capacitor is:

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C = QV

C = Q/V

C = V/Q

C = V2/Q

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