(a) An electric point charge of Q1 = 8.81 nC is placed at the origin of the real axis. Another point charge of Q2 = 4.47 nC is placed at a position of p = 3.55 m on the real axis. At which position can a third point charge of q = -9.15 nC be placed so that the net electrostatic force on it is zero? SOLVED (b) Let the sign of Q2 be changed from positive to negative. At which position can the point charge q be placed now so that the net electrostatic force on it is zero? I NEED (b). Answer only b

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.