Question

what is the SI unit of current sensitivity in moving coil galvanometer?

Answer 1

Current sensitivity in Galvanometer:

The deflection produced in a galvanometer when a unit current flows through it,

So the SI unit of current sensitivity will be

nit of current = Ampere = A
unit of unit area of deflection = Radian= rad

so Current sensitivity = area of deflection/ current 

= Rad/ A
or 
= RadA⁻¹