The coil of a galvanometer consists of $100$ $turns$ and effective area of $1\, square-cm$. The restoring couple is ${10^{ - 8}}\,N - m/radian$. The magnetic field between the pole pieces is $5\, T$. The current sensitivity of this galvanometer will be
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(d) Current sensitivity $\frac{\theta }{i} = \frac{{NBA}}{C}$
$ \Rightarrow \frac{\theta }{i} = \frac{{100 \times 5 \times {{10}^{ - 4}}}}{{{{10}^{ - 8}}}} = 5\;rad/\mu \;Amp$
$ \Rightarrow \frac{\theta }{i} = \frac{{100 \times 5 \times {{10}^{ - 4}}}}{{{{10}^{ - 8}}}} = 5\;rad/\mu \;Amp$
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