A galvanometer having a coil of resistance 30 Ω need 20 mA of current for full-scale deflection. If a maximum current of 3 A is to be measured using…

A galvanometer having a coil of resistance $\displaystyle 30 \Omega$ need $\displaystyle 20$ mA of current for full-scale deflection. If a maximum current of $\displaystyle 3$ A is to be measured using this galvanometer, the resistance of the shunt to be added to the galvanometer should be $\displaystyle \frac{30}{X} \Omega$, where $\displaystyle X$ is