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A $50 \Omega$ resistance is connected to a battery of $5 \;V$. A galvanometer of resistance $100\;Ω$ is to be used as an ammeter to measure current through the resistance, for this a resistance rs is connected to the galvanometer. Which of the following connections should be employed if the measured current is within $1 \%$ of the current without the ammeter in the circuit ?

$\begin{array}{1 1}(1) r_s=0.5 \Omega \text{n parallel with the galvanometer} \\ (2) r_s= 0.5 \Omega \text{in series with the galvanometer} \\ (3) r_s=1 \Omega \text{in series with galvanometer} \\ (4) r_s= 1 \Omega \text{in parallel with the galvanometer} \end{array} $

1 Answer

Solution :
Its clear, shunt should be applied in parallel and least the shunt resistance, better the ammeter is.
answered May 22 by meena.p

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