Electromagnetism Resource

3. Electric and Magnetic Fields

This chapter introduces some of the electromagnetic theory associated with electricity.

Some key points from this chapter:

There are two types of charge: positive and negative. Both charges create electric fields.
Static (non-moving) charges generate electric fields. These electric fields exert forces on charged particles.
Electric field forces can be attractive or repulsive.
Like charges repel, unlike charges attract.
Magnetic fields are generated by moving charged particles.
Magnetic fields are generated and can be held indefinitely by certain chemical elements such as iron, nickel and cobalt.