A current of 200?A deflects the coil of a moving coil galvanometer through 60°. The current to cause deflection through /10 radian is

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Solution

Q.
A current of 200μA deflects the coil of a moving coil galvanometer through 60°. The current to cause deflection through $π$ /10 radian is [2024]

1 30μA

2 120μA

3 60μA

4 180μA

Ans.
(3)

   $i \propto θ (angle of deflection)$

   $∴ \frac{i_{2}}{i_{1}} = \frac{θ_{2}}{θ_{1}} \Rightarrow \frac{i_{2}}{200 μ A} = \frac{π / 10}{π / 3} = \frac{3}{10}$

   $\Rightarrow i_{2} = 60 μ A$

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