Question

In a Galvanometer deflection is 60° when flowing electric current is 200 µA through Galvanometer then, find electric current at \(\frac \pi {10}\) rad deflection.

(1) 50 μΑ

(2) 70 µA

(3) 60 μΑ

(4) 80 μΑ

Answer 1

Correct option is (3) 60 μΑ

\(\because I \propto \theta\)

\(\therefore \frac{I_1}{I_2} = \frac{\theta_1}{\theta_2}\)

⇒ \(\frac{200\mu A}{I_1} = \frac{\pi/3}{\pi /10} = \frac{10}3\)

⇒ \(I_2 = 60 \mu A\)