| Principal 1 of Electrical Force | All electrical charges attract or repel one another: Like charges repel, while opposite charges attract. |
| Principal 2 of Electrical Force | The force between charged objects is directly proportional to the amount of electrical charge on each object. |
| Principal 3 of Electrical Force | The force between charged objects is inversely proportional to the square of the distance between the two objects. |
| Photon | A small "package" of light that acts like a particle. |
| Charging By Conduction | Charging an object by allowing it to come into contact with an object that already has an electrical charge. |
| Charging By Induction | Charging an object without direct contact between the object and a charge. |
| Electrical Current | The amount of charge that travels past a fixed point in an electric circuit each second. |
| Conventional Current | Current that flows from the positive side of the battery to the negative side. This is the way current is drawn in circuit diagrams, even though it is wrong. |
| Resistance | The ability of a material to impede the flow of charge. |
| Open Circuit. | A circuit that does not have a complete connection between the two sides of the power source. As a result, current does not flow. |
