A galvanometer having a coil resistance of $60\,\,\Omega$ shows full scale deflection when a current of $1.0$ $amp$ passes through it. It can be converted into an ammeter to read currents upto $5.0$ $amp$ by
AIPMT 2009, Medium
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$i G=(I-i) S$ where $G$ is the galvanometer resistance and $S$ is the shunt used with the ammeter. $1.0 \times 60=(5-1) S$ where $S$ is the shunt used to read a $5\, A$ current when the galvanometer can stand by $1\, \mathrm{A}.$
$S=\frac{1.0 \times 60}{4}=15 \,\Omega $ in parallel.
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