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Colour Coding of Resistors

The variable ...

Question

The variable resistance can be obtained through

A

resistor

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B

rheostat

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C

open switch

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D

none of these

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Solution

The correct option is A rheostat
Rheostat is a variable resistor, which is used to control the flow of electric current by manually increasing or decreasing the resistance.
Rheostat is generally used in the applications where high voltage or current is required.

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