Simply the given function (C/m3)x(m/s) Where C= coulomb m = meters s- sec
Current density( A/m2)
Potential per unit area ( v/m2)
Energy per unit area (J/m2)
Both a and b
Current density( A/m2)
(C/m3)x(m/s)= C/m2 s. q/t = I. So c/s= A. A/m2 or current per unit area