A shunt of resistance $1\,\Omega $ is connected across a galvanometer of $120\,\Omega $ resistance. A current of $5.5\, ampere$ gives full scale deflection in the galvanometer. The current that will give full scale deflection in the absence of the shunt is nearly ............... $ampere$
JEE MAIN 2013, Medium
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The current that will given full scale deflection in the absence of the shunt is nearly equal to the current through the galvanometer when shunt is connected i.e. $I_g$
$ \text { As } I_{8} =\frac{1 S}{G+S} $
$=\frac{5.5 \times 1}{120+1}=0.045 \text { ampere } $
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