Two metal spheres, one carrying a 8.0-μC charge and the other carrying a -21-μC charge, are initially 100 mm apart. They are brought in contact with each other and then moved back to their original positions. What is the numerical value of the ratio FEi /FEfFiE/ FfE, where FEiFiE is the magnitude of the electric force between the spheres before they are brought in contact and FEfFfE is the magnitude of that force after they are brought together and then moved back to their initial positions?

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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.