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A potentiometer work on

A potentiometer work on Correct Answer None of the above

The basic working principle of this is based on the fact that the fall of the potential across any portion of the wire is directly proportional to the length of the wire, provided wire has uniform cross-sectional area and the constant current flowing through it.

The working of the potentiometer is the same as that of a variable resistor. The construction is also the same. A rheostat is also a variable resistor and is a 2-terminal device. It is commonly used for handling higher currents and voltages.

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