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Electricity and Magnetism


7. 

In an electric bulb, a little nitrogen or argon is introduced at low pressure to

Answer : A. Cool the hot filament

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8. 

The nature of fuse wire is

Answer : A. high resistance and low melting point

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9. 

The newly discovered high temperature super conductors are

Answer : A. inorganic polymers

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10. 

Choke is used to

Answer : A. reduce the current in AC circuit

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11. 

The filament of an electric bulb is made of

Answer : A. Tungsten

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12. 

An electric bulb is connected to a 220 V generator. The current is 0.50 A. What is the power of the bulb?

Answer : B. 110 W

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