A moving coil galvanometer has 150 equal divi | vedclass

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(B) The galvanometer has $150$ equal divisions.Given: Current sensitivity $= 10 	ext{ div/mA}$ and Voltage sensitivity $= 2 	ext{ div/mV}$.The maxim

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$9995$

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(B) The galvanometer has $150$ equal divisions.Given: Current sensitivity $= 10 	ext{ div/mA}$ and Voltage sensitivity $= 2 	ext{ div/mV}$.The maximum current $I_g$ for full-scale deflection is $I_g = \frac{150 	ext{ div}}{10 	ext{ div/mA}} = 15 	ext{ mA} = 15 	imes 10^{-3} 	ext{ A}$.The maximum voltage $V_g$ for full-scale deflection is $V_g = \frac{150 	ext{ div}}{2 	ext{ div/mV}} = 75 	ext{ mV} = 75 	imes 10^{-3} 	ext{ V}$.The resistance of the galvanometer $G$ is $G = \frac{V_g}{I_g} = \frac{75 	imes 10^{-3} 	ext{ V}}{15 	imes 10^{-3} 	ext{ A}} = 5 \ \Omega$.To read $1 	ext{ V}$ per division,the total range $V$ required is $150 	ext{ divisions} 	imes 1 	ext{ V/division} = 150 	ext{ V}$.The series resistance $R$ required is $R = \frac{V}{I_g} - G$.$R = \frac{150}{15 	imes 10^{-3}} - 5 = 10000 - 5 = 9995 \ \Omega$.

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