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## Homework Statement

Consider the two parallel electric dipoles shown.

+ (Q) + (Q) | (Distance=d/2)

------------------------------------------x------

- (-Q) - (-Q) | (Distance=d/2)

|-------Distance=X-----------|

a) Do the two dipoles attract or repel from each other

b) Let x>>d. Find an approximate expression for the force between the two dipoles. The expression is in terms of Q,d, and x.

C) sketch the graph of F vs. x.

## Homework Equations

Coulombs's law

F=k(q

_{1}q

_{2}/r

^{2}

## The Attempt at a Solution

I an completely new to Coulomb's law and dipoles so i don't know how to start.

a) The answer is they repel but i dont get why. I know the top/bottom two charges will repel but wont they attract each other diagonally?

b)Have not attempted. Don't know how to start.

c) Stuck on b. didnt get to this yet