Two charges +Q and –Q are located as shown on the diagram. × is the point halfway
between the two charges.
A small positive charge moves from +Q to –Q.
Which statement about the resultant force on this charge, as it passes through ×, is
A The magnitude of the resultant force is a maximum.
B The magnitude of the resultant force is a minimum.
C The resultant force changes direction.
D The resultant force is zero.