Which component is used to regulate current without changing the voltage source in an electric circuit?



A component used to regulate current without changing the voltage source in an electric circuit is called  variable resistance or rheostat.


Explanation

A rheostat is an electrical device which is used to control the flow of electric current or the varying resistance in an electric circuit by manually increasing or decreasing the resistance, which in turn, either increases or decreases the current through the circuit.

In an electric circuit, if the circuit resistance is lowered, the electric current flowing through the circuit increases. Conversely, if the circuit resistance is increased, the electric current flowing through the circuit gets limited.


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