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Question

The filament of an electric bulb glows because, when electric current flows through it,
(a) a chemical reaction takes place
(b) the filament heats up
(c) the terminals heat up
(d) the filament cools down


Solution

 (b) the filament heats up
The filament of an electric bulb glows because, when electric current flows through it, the filament heats up.

Science
Science in Everyday
Standard VI

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