Physics Quiz

Quiz 2:

1) Two equal opposite charges are separated from each other with distance d create an electric dipole moment

a) Find the electric potential at point A at distance r from the midpoint of two charges (see Fig 1).

b) Suppose d << r find an approximate expression for the electric potential at point A. Hint: use , and for , where and are distances between the positive and the negative charges to point A.

c) The magnitude of the electric dipole is . Write you answer from part b in terms of The magnitude of electric dipole .

Fig 1: problem (1)