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Galvanometer

A galvanomete...

Question

A galvanometer requires 10 A for one division of its scale. It is to be used to measure a current of 1 amp to the full scale deflection. The scale has 100 divisions. The value of shunt if the resistance of the galvanometer is 999 $Ω$ is

A

2

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B

3

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C

1

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D

4

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Solution

The correct option is B 1
Since, 1 division measures 10 A and there are 100 such divisions, i $=$ 1000 A
Using, the formula for the shunt resistance required,
S $= \frac{i_{g} G}{i - i_{g}}$
S $= \frac{1 \times 999}{1000 - 1}$
S $=$ 1

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