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MHT CET 2023 (10 May, Shift 2) · Kirchhoff's Laws & Measuring Instruments

Kirchhoff's Laws & Measuring Instruments question from MHT CET 2023 (10 May, Shift 2)

Q78MHT CET 2023 · 10 MAY · SHIFT 2Easy

Kirchhoff's Laws & Measuring Instruments

A galvanometer has resistance ' $G$ ' and range ' $V_g$ '. How much resistance is required to read voltage upto ' $V$ ' volt?

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Answer: (a)

Full-scale current $I_g = \frac{V_g}{G}$ .
Series resistance: $R = \frac{V}{I_g} - G = \frac{VG}{V_g} - G$
$R = G\left(\frac{V}{V_g} - 1\right)$ , so the answer is (a).

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