PHYS 202 Lecture 16: Day15

Prove:

A x (B x C) + B x (C x A)+ C x (A x B) = 0

Two charges, each 7 µC, are on the x axis, one at the origin andthe other at x = 8 m. Find the electric field on the x axis at eachof the following locations.
(a) x = -2 m
1: N/C ihatbold

(b) x = 2 m
2: N/C ihatbold

(c) x = 6 m
3: N/C ihatbold

(d) x = 10 m
4: N/C ihatbold

(e) At what point on the x axis is the electric field zero?
5: m