8. The electric field at a distance of 1.0 m from a charged sphere is 100 N/C. At what distance from the sphere will the electric field be 50 N/C? a) 1.1 m. 1.4 m b) 9. Two metal spheres that are initially uncharged are mounted on insulating stands, as shown. A negatively charged rubber rod is brought close to, but does not make contact with, sphere 1. Sphere 2 is then brought close to 1 on the side opposite to the rubber rod. Sphere 2 is allowed to touch 1 and then is removed some distance away. The rubber rod is then moved far away from 1 and 2 What are the final charges on the spheres? Sphere 2 Negative Positive Sphere 1 a) Negative b) Negative c) Positive d) Positive c) 2.0 m. d) 4.0 m. Negative Positive 1

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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.