Monday, October 19, 2009

Physics: Chapter 14 - Static Electricity

14.1 Electrostatics
It is the study of static electric charges.

Electrostatic charging by friction
Some objects acquire electric charges by rubbing them together to transfer electrons from one object to another.

There are two types of charges: positive and negative.
Like charges repel, unlike charges attract.

Measurement of electric charge
Electric charge is measured in coulombs, C.

14.2 Electric Field
An electric field is a region where an electric charge experiences an electric force.

The direction of the field is defines as the direction of the force on a small positive charge.

The strength of an electric field is indicated by how close the field lines are to each other.

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