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The coil of galvanometer consist of 100 turns and effective area 1 square cm the restoring couple is $10^{-8}Nmrad .$ The magnetic field b/w the poles pieces is 5T . The current sensitivity of this galvanometer will be in rad/Micro-amp
Option: 1
$5 \times 10^{-4}$

Option: 2
$5 \times 10^{-6}$

Option: 3
$2 \times 10^{-7}$

Option: 4
5

Answers (1)

best_answer

$\begin{aligned} &S_{i}=\frac{\theta}{P}=\frac{N B A}{C} \Rightarrow \frac{\theta}{C}=\frac{100 \times 5 \times 10^{-4}}{10^{-8}}=5 \times 10^{6} \mathrm{rad} / \mathrm{amp}= \\ &\mathrm{rad} / \mu A \end{aligned}$

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HARSH KANKARIA

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