Take a look at the Physics Tutoring: Electrostatic Pendulum Lab
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Q: Are all charged objects subject to Coulomb's law? A: Yes. The French physicist Coulomb derived (from experiments) a formula for the force F applied by an electric field E to a charge q. All charges placed in electric fields are subjected to forces. The Coulomb formula for the force applied by an electric field to a charge is: F = E . q |
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Q: When wearing rubber soled shoes and scuffing them on a carpet it is possible to build up a charge and shock people by touching them. Please explain how the charge is built up and then dissipated. A: Person A, the one with the rubber shoes, becomes charged by walking on the carpet as a result of repeated contact and separation between the soles of his shoes and the carpet. If another person B now touches him, the charge accumulated on A will be transferred to B and both of them will feel the shock of charge transfer. |
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Conductors: a material or object that permits an electric current to flow easily.
Insulators: a material that is a poor conductor (does not permit an easy flow of electric current)
The SI Unit for charge is the coulomb (C.) It is defined in terms of the unit of current ampere (A) as the charge passing through a particular point in 1 second when there is a current of 1 ampere in that point.
| Coulomb's Law |  |
| Permitivity Constant |  0
= 8.85418781762 x 10-12 C2/(N m2) |
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