# 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 ?

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

Solution :
Its clear, shunt should be applied in parallel and least the shunt resistance, better the ammeter is.