A galvanometer is used in laboratory for detecting the null point in electrical experiments. If, on passing a current of 6mA it produces a deflection of 2°, its figure of merit is close to :
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A galvanometer is used in laboratory for detecting the null point in electrical experiments. If, on passing a current of 6mA it produces a deflection of 2°, its figure of merit is close to :

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 A (3 × 10⁻³ A/div).