If the number of turns in a moving coil galvanometer of current sensitivity $C$ and voltage sensitiv

Question

If the number of turns in a moving coil galvanometer of current sensitivity $C$ and voltage sensitivity V is doubled, then\

Professor PC Thomas Classes · Answer

Current sensitivity, $\mathrm{C}=\frac{\mathrm{NAB}}{\mathrm{k}}$ Voltage sensitivity, $\mathrm{V}=\left(\frac{\mathrm{NAB}}{\mathrm{k}}ight) \frac{1}{\mathrm{R}}$\ If $\mathrm{N} ightarrow 2 \mathrm{~N}$ i.e., double the number of turns, then\ $\mathrm{C} ightarrow 2 \mathrm{C}$\ Thus, the current sensitivity doubled.\ If $\mathrm{N} ightarrow 2 \mathrm{~N}$, then $\mathrm{R} ightarrow 2 \mathrm{R}$,\ $	herefore \mathrm{V} ightarrow \mathrm{V}$\ Thus, the voltage sensitivity remains unchanged\