Physics - Current Electricity Question with Solution | TestHub

Given: current sensitivity $=10\mathrm{div}/\mathrm{mA}$ and there are 100 division on the scale. $\therefore$ Current required for full scale deflection. ${\mathrm{I}}_{\mathrm{g}}=\frac{1}{10}\times 100\mathrm{mA}=10\mathrm{mA}=0.01\mathrm{A}$ Also voltage sensitivity $=2\mathrm{div}/\mathrm{mV}$ $\therefore$ voltage required for full scale deflection ${\mathrm{V}}_{\mathrm{g}}=\frac{1}{2}\times 100\mathrm{mV}=0.05\mathrm{V}$ Galvanometer resistance is given by $\mathrm{G}=\frac{{\mathrm{V}}_{\mathrm{g}}}{{\mathrm{I}}_{\mathrm{g}}}=\frac{0.05}{0.01}=5\Omega$