Name the instrument used to control amount of current in an electric circuit. Draw its symbol also.
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A rheostat is used to control the amount of current in an electrical circuit
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Rheostat
Explanation:
Resistor is an electrical component that reduces the electric current in a circuit. The resistor's ability to reduce the current is called resistance and is measured in units of ohms. A rheostat is a variable resistor which is used to control current. They are able to vary the resistance in a circuit without interruption.
Please find the attached picture to see the symbol for a resistor in an electric circuit.
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