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Class 10 Science Medium Mcq English Medium

A device used to change resistance in a circuit without changing the source voltage is called a:

Question
A device used to change resistance in a circuit without changing the source voltage is called a:
Ammeter
Voltmeter
Rheostat
Fuse
Answer
Rheostat
Detailed Explanation
A rheostat is a variable resistance device used to regulate current in a circuit.
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