A moving coil of galvanometer when shunted with 2 Ω resistance gives… | JEE Main 2026 (6 Apr, Shift 2)

Q11JEE Main 2026 · 6 APR · SHIFT 2Medium

Moving Coil Galvanometer, Ammeter & Voltmeter

A moving coil of galvanometer when shunted with $2\ \Omega$ resistance gives a full scale deflection for a current of 500 mA. When a resistance of $470\ \Omega$ 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 $\rule{2em}{0.4pt}\ \Omega$ .

Numerical answer type. Work it out, then open the answer.

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Answer: 50

As ammeter: $I_g G = (0.5 - I_g) \times 2 \Rightarrow I_g = \frac{1}{G+2}$ .
As voltmeter: $I_g (G + 470) = 10$ .
$\frac{G+470}{G+2} = 10 \Rightarrow G + 470 = 10G + 20 \Rightarrow 9G = 450$
$G = 50\ \Omega$

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Moving Coil Galvanometer, Ammeter & Voltmeter question from JEE Main 2026 (6 Apr, Shift 2)

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