Electrostatics & Electric Fields


Static electricity is the electric charge that an objects has. It can either be positively charged or negatively charged. Like charges repel each other and opposites attract. If it has no charges, the object is called neutral. The net charge of everything always stays the same. This is the law of conservation of electricity. Electrons are what are responsible for negative charges and protons are responsible for positive charges. An electron has the charge of 1.602x10^-19C
external image electrical_charges-like_charges.gif

Charges can cross conductors and cannot cross insulators.

An object that has a charge also creates an electric field. This electric field is similar to both a gravitational field and a magnetic field. The strength of an electric field can be found by using E=F/q. The electric field lines are identical to what a magnetic fields lines would be with the positive being the north and the negative being the south. external image u07vC.jpg
Electrical field direction from (+) to (−)
Electrical field direction from (+) to (−)



External Link:
http://www.school-for-champions.com/science/electrical_charges.htm