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JEE Main 2026 (24 Jan, Shift 2) · Kirchhoff's Laws & Measuring Instruments

Kirchhoff's Laws & Measuring Instruments question from JEE Main 2026 (24 Jan, Shift 2)

Q5JEE Main 2026 · 24 JAN · SHIFT 2Easy

Kirchhoff's Laws & Measuring Instruments

A moving coil galvanometer of resistance $100\ \Omega$ shows a full scale deflection for a current of 1 mA. The value of resistance required to convert this galvanometer into an ammeter, showing full scale deflection for a current of 5 mA, is $\underline{\qquad}\ \Omega$

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Answer: (a)

A shunt is needed: $S = \frac{I_g G}{I - I_g}$ .
$S = \frac{1 \times 100}{5 - 1} = 25\ \Omega$
So the answer is (a) 25.

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