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JEE Main 2021 (27 Aug, Shift 2) · Kirchhoff's Laws & Measuring Instruments

Kirchhoff's Laws & Measuring Instruments question from JEE Main 2021 (27 Aug, Shift 2)

Q131JEE Main 2021 · 27 AUG · SHIFT 2Medium

Kirchhoff's Laws & Measuring Instruments

For full scale deflection of total 50 divisions, 50 mV voltage is required in galvanometer. The resistance of galvanometer if its current sensitivity is 2 div/mA will be:

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Answer: (d)

Full scale current $= \frac{50\text{ div}}{2\text{ div/mA}} = 25\text{ mA}$
$G = \frac{V}{I} = \frac{50\text{ mV}}{25\text{ mA}} = 2\ \Omega$
So the answer is (d) $2\ \Omega$ .

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