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JEE Main 2021 (31 Aug, Shift 1) · Kirchhoff's Laws & Measuring Instruments

Kirchhoff's Laws & Measuring Instruments question from JEE Main 2021 (31 Aug, Shift 1)

Q130JEE Main 2021 · 31 AUG · SHIFT 1Medium

Kirchhoff's Laws & Measuring Instruments

Consider a galvanometer shunted with 5 $\Omega$ resistance and 2% of current passes through it. What is the resistance of the given galvanometer?

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Answer: (c)

$I_g = 0.02I$ , shunt current $= 0.98I$ .
$I_g G = I_s S \Rightarrow 0.02I \cdot G = 0.98I \times 5$
$G = \frac{4.9}{0.02} = 245\ \Omega$
So the answer is (c) $245\ \Omega$ .

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