Part A\ What is the magnitude

E

of the electric field at the point on the

x

axis with

x

coordinate

(a)/(2)

? Express your answer in terms of

\\\\eta _(r)R,a

, and the permittivity of free space

\\\\epsi lon_(0)

.\ View Available Hint(s)\

E=

What is the magnitude E of the electric field at the point on the x axis with x coordinate a/2 ? Express your answer in terms of ,R,a, and the permittivity of free space 0