What is a rheostat? What is it's function? How does it function?
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its is a variable resistant...it is used to regulate current without changing the voltage .....for its function it can be connected to a circuit first...
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A rheostat is a variable resistor which is used 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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