Two tiny spheres A and B are placed along a line so that each is 10.0 cm from the point P, as shown below. A third sphere C is placed 5.0 cm under sphere A. The spheres hold electrical charges of qA = +0.10 µC, qB = −0.20 µC, and qC = +0.20 µC. (a) Calculate the electric potential VP at the point P. Assume V = 0 is at r → ∞. (b) Calculate the net electric Field E~net (magnitude and direction) at the point P due to the three other spheres. (c) If a single electron is placed at the point P and released, what will be its speed v once it has moved very far away from the spheres (i.e. where V ∼ 0)?

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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.