Chapter 2, Problem 2.4P

Suppose ${\text{Q}}_{\text{1}}\text{(0}\text{.0,-3}\text{.0m,0}\text{.0)=4}\text{.0}\text{nC,}$

${\text{Q}}_{\text{2}}\text{(0}\text{.0,3}\text{.0m,0}\text{.0)=4}\text{.0}\text{nC,}$ and ${\text{Q}}_{\text{3}}\text{(4}\text{.0 m,0}\text{.0,0}\text{.0)=1}\text{.0}\text{nC}$. (a) Find the total force acting on the charge Q₃. (b) Repeat the problem after changing the charge of Q₂ to –4.0 nC. (c) Find the electric field intensity for parts (a) and (b).