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Current Electricity

JEE Main level, single correct, medium

373 of 380

Question 373 of 380

To find the resistance of a galvanometer by the half deflection method the following circuit is used with resistances $\mathrm{R}_1=9970 \mathrm{~W}, \mathrm{R}_2=30 \mathrm{~W}$ and $\mathrm{R}_3=0$ . The deflection in the galvanometer is d. With $\mathrm{R}_3=107 \mathrm{~W}$ the deflection changed to $\frac{d}{2}$ . The galvanometer resistance is approximately:

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Answer: (D) $77 \Omega$

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JEE Main question paper PDF

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JEE Main 2025 Apr 2 Shift 1 question paper

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