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Potential energy is the type of energy that depends on position.

An object will move from a place of high potential energy to a place of low potential energy.

The potential energy of water is greater at the top of the waterfall than at the bottom, so water flows from the top to the bottom.

In a similar way, electrons in a circuit have potential energy, however, the potential energy is related not to the height but to the force exerted by electric fields.

The potential energy per unit of electric charge is called electrical potential.

The difference in electrical potential between two places is called the potential difference.

It provides the force that pushes charge through a circuit.

The unit of measure of potential difference is the volt (V). For this reason potential difference is also called voltage.

Electrons will flow as long as there is a potential difference , or voltage between two parts of a circuit.

The flow of electrons through a material is called current.

Voltage causes current to flow through an electric circuit.

Just as an increase in the difference in height causes a greater flow of water, an increase in voltage causes a greater flow of electric current.

Resistance is the opposition to the movement of electric charges flowing through a material.

The greater the resistance, the less current there is for a given voltage.