The sensitivity of a galvanometer of resistance 406 ohm is increased by 30 times. The shunt used is
Answer & explanation
Correct answer: option 2
$\text{ Current Sensitivity } = \frac{i}{i_g} = 30$
$ Shunt = \frac{Gi_g}{i - i_g} = \frac{406}{29} = 14\Omega$