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Circuit diagram & commonly used symbols

What is a rhe...

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What is a rheostat?

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Solution

A rheostat is a variable resistor which is use
d to control current. They are able to vary the resistance in a circuit without interruption. The construction is very similar to the construction of a potentiometers. It uses only two connections, even when 3 terminals (as in a potentiometer) are present.

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