Q129. A point charge Q is placed at the midpoint of a line joining two charges, 4q and q. If the net force on the charge q is 0, then Q must be equal to:Physics — NUST Mock By IBAGRADS 3 — Question 129 of 200A. -qB. +qC. -2qD. +4qPractice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →