A galvanometer having a coil resistance of 100Ω gives a full scale deflection, when a current of 1 mA is passed through it. The value of the resistance, which can convert this galvanometer into ammeter giving a full scale deflection for a current of 10A, is :-
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Question

A galvanometer having a coil resistance of 100Ω gives a full scale deflection, when a current of 1 mA is passed through it. The value of the resistance, which can convert this galvanometer into ammeter giving a full scale deflection for a current of 10A, is :-

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G1 Physics · Accepted Answer

Treat an ideal voltmeter as open circuit and an ideal ammeter as zero resistance; for galvanometer conversion use the standard series/shunt resistance relations. The result matches B (0.01Ω).