Chapter 20 Electricity Vocabulary ( electric current and ohms law)

Battery

A device that converts chemical energy to electrical energy

Electrical conductor

A material in which electric charge can flow easily

Electrical insulator

A material in which electric charge cannot flow easily

Superconductor

A material that has almost zero resistance when it is cooler to low temperatures

Direct current

Electric charge only flows in one direction

Alternating current

Electric charge that regularly reverses direction

Resistance

Opposition to the flow of electrical charge in a system

Electric current

The continuous flow of electric charge

Potential difference

The difference in electrical potential energy between two places in an electrical field

Ohms law

The voltage in a circuit equals the product of the current and resistance

Voltage

This is another word for potential difference