In a moving coil galvanometer, the deflection of the coil $\theta$ is related to the electrical current i by the relation

(a) $i\propto \mathrm{tan}\theta$                  (b) $i\propto \theta$

(c) $i\propto {\theta }^{2}$                     (d) $i\propto \sqrt{\theta }$

(b) $i=\frac{C\theta }{NAB}⇒i\propto \theta$

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