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Question

A thin wire that emits light in a bulb is known as _____.


A

insulator

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B

filament

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C

reflector

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D

refractor

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Solution

The correct option is B

filament


The thin wire that emits light is known as the filament of the bulb. It is generally made up of tungsten. When current passes through it, it heats up and glows.


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