8 . Three charges are arranged in an equilateral triangle, as shown above. At which of these points is
the electric potential smallest?
(A) A
(B) B
(C) C
(D) D
(E) E
9 . The diagram shows a set of equipotential surfaces. At point P , what is the direction of the electric
field?
(A) left
(B) right
(C) up the page
(D) down the page
(E) either left or right, which one cannot be determined