What is the current sensitivity of a galvanometer? How can it be increased?

(N/A) The current sensitivity of a galvanometer is defined as the deflection produced per unit current flowing through it.
Mathematically,it is given by $\frac{\phi}{I} = \frac{NAB}{k}$,where $N$ is the number of turns,$A$ is the area of the coil,$B$ is the magnetic field,and $k$ is the restoring torque per unit twist.
To increase the current sensitivity,one can increase the number of turns $(N)$,the area of the coil $(A)$,or the magnetic field strength $(B)$,or decrease the restoring torque constant $(k)$.