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Galvanometer

A galvanomete...

Question

A galvanometer of resistance 100 ohms is shunted so that only 1/11 of the main current flows through the galvanometer. The resistance of the shunt is

A

1 ohm

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B

11 ohms

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C

10 ohms

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D

9 ohms

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Solution

The correct option is C 10 ohms
Let resistance of shunt be x
= $R e q = \frac{100 x}{100 + n}$

$\frac{100 x}{100 + x} = \frac{1}{11} (100)$

= 11x = 100+x
=x=10 $Ω$

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