Current sensitivity of a moving coil galvanometer is the deflection θ per unit current I flowing through it, i.e.

…(i)

where, N = number of turns in the coil,
A = Area of each turn of coil, B = magnetic field
k = restoring torque per unit twist of the fiber strip.

Similarly, voltage sensitivity is the deflection per unit voltage, i.e.

…(ii)

where, R G is the resistance of the galvanometer.
From Eqs. (i) and (ii), we get

…(iii)

Here,

and
Substituting the given values in Eq. (iii), we get

The resistance of the galvanometer is .