Current sensitivity of a moving coil galvanom | vedclass

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(D) Current sensitivity $(I_s)$ is defined as the deflection per unit current: $I_s = \frac{	heta}{I}$.Voltage sensitivity $(V_s)$ is defined as the

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$250$

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(D) Current sensitivity $(I_s)$ is defined as the deflection per unit current: $I_s = \frac{	heta}{I}$.Voltage sensitivity $(V_s)$ is defined as the deflection per unit voltage: $V_s = \frac{	heta}{V}$.Since $V = IR$,where $R$ is the resistance of the galvanometer $(R_G)$,we have $V_s = \frac{	heta}{I R_G} = \frac{I_s}{R_G}$.Therefore,the resistance of the galvanometer is $R_G = \frac{I_s}{V_s}$.Given: $I_s = 5\,div/mA = 5\,div/(10^{-3}\,A) = 5000\,div/A$.Given: $V_s = 20\,div/V$.Substituting the values: $R_G = \frac{5000}{20} = 250\,\Omega$.

Current sensitivity of a moving coil galvanometer is $5\,div/mA$ and its voltage sensitivity (angular deflection per unit voltage applied) is $20\,div/V$. The resistance of the galvanometer is ................. $\Omega$.

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