The range of an ammeter of resistance G can b | vedclass

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(B) To increase the range of an ammeter,a shunt resistance $S$ must be connected in parallel with the galvanometer of resistance $G$.Let $I_g$ be the

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$A$ shunt of $\frac{G}{n-1} \Omega$

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(B) To increase the range of an ammeter,a shunt resistance $S$ must be connected in parallel with the galvanometer of resistance $G$.Let $I_g$ be the current for full-scale deflection of the galvanometer.The formula for the shunt resistance required to increase the range from $I_g$ to $I$ is given by $S = \frac{I_g G}{I - I_g}$.Given that the range is increased from $I_g = I$ to $I' = nI$,we substitute $I' = nI$ into the formula:$S = \frac{I G}{nI - I} = \frac{I G}{I(n - 1)} = \frac{G}{n - 1} \Omega$.Therefore,a shunt of $\frac{G}{n-1} \Omega$ must be connected in parallel.

The range of an ammeter of resistance $G$ can be increased from $I$ to $nI$ by connecting

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