Two-charged rings are placed in the xy plane and centered at the origin in the free space, as shown
in figure (2). The first ring has a radius a=0.10m and carries a uniform line charge density \rho _(l_(1))=
20n(C)/(m). The second ring has a radius 2a and carries a uniform line charge density \rho _(l2)=
-20n(C)/(m). Find the following:
a3a and centered at the origin
b3M The electric potential on z-axis and determine the point(s) where the potential is zero
c3M The electric field on the z(s) where the field is zero
d2M The force developed on charge of 27 nC when it is placed at the point (0,0,1)