Electric field zero point for two charges · CAP 2013 #11
Physics · electromagnetism
Problem
Two point charges −2Q and +Q are placed on the x-axis with −2Q at x = 0 and +Q at x = a. Which of the following statements is true?
a) There is no point on the x-axis where the electric field is zero.
b) There is a point on the x-axis, at x < 0, where the electric field is zero.
c) There is a point on the x-axis, between the charges (0 < x < a), where the electric field is zero.
d) There is a point on the x-axis, at x > a, where the electric field is zero.