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Question: Answered & Verified by Expert
A certain current on passing through a galvanometer produces a deflection of 100 divisions. When a shunt of one ohm is connected, the deflection reduces to 1 division. The galvanometer resistance is
PhysicsCurrent ElectricityKCETKCET 2008
Options:
  • A $100 \Omega$
  • B $99 \Omega$
  • C $10 \Omega$
  • D $9.9 \Omega$
Solution:
1602 Upvotes Verified Answer
The correct answer is: $99 \Omega$
Shunt is connected to the galvanometer
$$
\begin{aligned}
i_{g} &=\frac{i S}{S+G} \\
1 &=\frac{100 \times 1}{(1+G)} \\
G &=99 \Omega
\end{aligned}
$$
$$
\Rightarrow \quad G=99 \Omega
$$

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