The sensitivity of a galvanometer of resistance $406\, ohm$ is decreased by $30\, times$. The shunt used is .................. $\Omega$
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$\frac{\mathrm{i}}{\mathrm{i}_{\mathrm{g}}}=30 .$ The shunt $\mathrm{S}=\frac{\mathrm{Gi}_{\mathrm{g}}}{\mathrm{i}-\mathrm{i}_{\mathrm{g}}}=\frac{406}{29}=14\, \Omega.$
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