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PHYSICS

Physics
Electricity is transmitted over long distances

It is fast
It is safer
There is less wastage of energy
It is cheaper

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Physics
Tungsten is used for the manufacture of the filament of an electric bulb, because

It has a very high melting point
It is a good conductor
It is malleable
It is economical

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Physics
In a filament type light bulb most of the electric power consumed appears as

Visible light
Infra-red rays
Fluorescent light
Ultra-violet rays

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Physics
Which of the following metals is used for the manufacture of heating elements provided in electric iron ?

Tungsten
Chromium
Nichrome
Nickel

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Physics
When an electric bulb breaks, there is an explosive sound. That is due to

The air outside rushing in to fill the vacuum inside the bulb
The compressed gases inside rushing out suddenly
None of these
The chemical reaction between the gases inside the bulb

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