I'm having trouble understanding some of these basic electrostatic priciples and my book isn't much help. I've put them in a true/false format. If I could get at few answers, it would really help me understand this. A positive point charge +q is placed at point p to the right of two charges, A and B. The net force on the +q charge is found to be zero. Which of the statements below are true? A-----------B-----------P ++++++++++++++++++++q True or False -- The magnitude of the charge A must be smaller than B. True or False -- Reversing the sign of +q to -q would make the force on it nonzero. True or False -- B must have the same sign as A and be less in magnitude. True or False -- B must have the opposite sign from A and be less in magnitude. True or False -- Either A or B must be positive.