When we lift the ball off the ground, we are giving it what we call GRAVITATIONAL POTENTIAL ENERGY. In much the same way, when we pull the plus charge away from the minus charge, we are giving it ELECTRICAL POTENTIAL ENERGY. The amount of energy increases the higher we lift the ball up or the farther away we pull the plus charge. When released, the ball will rush back to the ground and the plus charge will rush back to the minus charge.

Lifting the ball off the ground gives it some

**HEIGHT**. Pulling the plus charge away from the minus charge gives it some

**DISTANCE**.

**This distance measures VOLTAGE.**The

*farther away*we pull the plus charge from the minus charge, the

*greater*the voltage is.