Question $2$

A rod of charge $-4\mathrm{.}30nC$ is bent into a semicircle of radius $R=27\mathrm{.}2cm.$ A second rod, this one straight of charge $+4\mathrm{.}30nC$ and

length $2R,$ is placed a distance $d=5\mathrm{.}40cm$ from the semicircle, as shown below. What is the magnitude of the electric field at the

dot?

Magnitude of electric field: