Physics Classroom
The Physics Classroom: Requirements of a Circuit
What four arrangements would result in the successful lighting of a lightbulb? And more importantly, what does each of the four arrangements have in common that would lead to an understanding of the two requirements of an electric...
CK-12 Foundation
Ck 12: Voltage
[Free Registration/Login may be required to access all resource tools.] This lesson looks at what voltage is and how to solve problems involving voltage. Includes a simulation for exploring how charges work in an electric field.