Question

What are the (a) magnitude and (b) direction (relative to the positive direction of the x axis) of the dipoles electric field at point p, located at a distance r>>d?

Answer 1

I know how to somewhat start the problem, but I am having a hard time understanding one part.

Answer 2

Just add the fields from the point sources, paying attention to geometry. The field will decline as 1/r^3 and along that mid-plane will be tangential rather than radial. Here, it will point down.

Answer 3

What equation do we use?