Current Electricity Question 10
Question 10 - 2024 (27 Jan Shift 2)
A current of $200 \mu A$ deflects the coil of a moving coil galvanometer through $60^{\circ}$. The current to cause deflection through $\frac{\pi}{10}$ radian is :
(1) $30 \mu A$
(2) $120 \mu A$
(3) $60 \mu A$
(4) $180 \mu A$
Show Answer
Answer: (3)
Solution:
$i \propto \theta$ (angle of deflection)
$\therefore \frac{i _2}{i _1}=\frac{\theta _2}{\theta _1} \Rightarrow \frac{i _2}{200 \mu A}=\frac{\pi / 10}{\pi / 3}=\frac{3}{10}$
$\Rightarrow i _2=60 \mu A$
