In this unit students take a deeper look into charges beyond the simplified 'opposites attract." Students learn to calculate those attractive and repulsive forces and to show how invisible fields are responsible for them.

This lesson focuses on static electricity, including how particles can be charged by friction, and electrical forces and why they repel or attract each other. Includes a link to a test.

This lesson focuses on electric charges. Electric current is the flow of electric charge. Some insulating materials become electrically charged when they are rubbed together. A substance that gains electrons becomes negatively charged,...