JEE Main 2026 · 6 Apr · Shift 2 · Physics Q48

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A moving coil of galvanometer when shunted with 2 Ω resistance gives a full scale deflection for a current of 500 mA. When a resistance of 470 Ω is connected in series it gives a full scale deflection for 10 V potential applied on it. The value of resistance of galvanometer coil is ________ Ω.

Your answer

Answer and worked solution

Official answer: 50

Shunt. $I_gG=(0.5-I_g)\times2$ , so $I_g(G+2)=1$ .

Series resistor. $I_g(G+470)=10$ .

Divide. $\dfrac{G+470}{G+2}=10$ , so $G=50$ Ω.

Answer: 50

Topics:Moving coil galvanometer Ammeters and voltmeters

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JEE Main 2026 · 6 Apr · Shift 2, Physics question 48