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A galvanometer has a resistance of 30 Omega. It gives full scale deflection with a current of 2 mA. Calculate the value of the resistance needed to convert it into an ammeter of range 0 - 0.3 A. |
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Answer» SOLUTION :Here `R_G = 30 OMEGA, I_g = 2 mA = 2 XX 10^(-3) A and I = 0.3 A` `:.` VALUE of SHUNT resistance `r_(s) = (I_g cdot R_G)/((I - I_g)) = (2 xx 10^(-3) xx 30)/((0.3 - 2 xx 10^(-3))) = 0.06 Omega`. |
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