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AIIMS 2009

Exam: AIIMS
Year: 2009
Subject: Physics
Chapter: Current Electricity

AIIMS 2009 · Physics · Current Electricity

A moving coil galvanometer has a resistance of 900 . In order to...

A moving coil galvanometer has a resistance of

900 \Omega

. In order to send only

10 \%

of the main current through this galvanometer, the resistance of the required shunt is

Options

A $0.9 \Omega$
B $100 \Omega$
C $405 \Omega$
D $90 \Omega$

Correct answer

B. $100 \Omega$

Step-by-step solution

\begin{aligned} & \text{ (b) }: I_g=0.1 I, I_s=0.9 I ; S=I_g G / I_s \\ & =0.1 \times 900 / 0.9=100 \Omega\end{aligned}

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