Questions 20-21
Particles of charge Q and -4 Q are located on the x -axis as shown in the figure above. Assume the particles are isolated from all other charges.
20. Which of the following describes the direction of the electric field at point P ?
(A) +x
(B) +y
(C)-y
(D) Components in both the −x− and +y -directions
(E) Components in both the +x− and -y -directions