jack343
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Homework Statement
Two equal and opposite charges form a dipole, as shown in the figure. What is the magnitude of the electric field at point P, in terms of k,q,d, and x? If point P is VERY far away, show that the result is approximately E = kqd/x^3.
http://imageshack.us/photo/my-images/403/img20111215161448.jpg/
please help :(
Homework Equations
F = kq1q2/r^2
E= F/q
The Attempt at a Solution
I don't know how to start? Does the dipole basically act like a wire?
I did some research on dipoles and nothing was related.