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What is rheostat and its work |
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Answer» A rheostat is a variable resistor or an adjustable resistor.Its resistance can be varied as desired.It is a continuous resistance varying device used to change the magnitude of current in a circuit by changing the length of the resistance wire inserted into the circuit.The main use of a rheostat is as variable resistance . Variable resistance is called rheostat..It is used to change the direction of current.. |
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