Electric Current and Circuits

Flashcards covering key vocabulary and concepts from a lecture on electric current, resistance, Ohm's Law, electric power, and circuits.

Electric Current

The flow of electric charge.

Electric Potential Difference

The difference in electric potential between two points.

Current

The flow of charges.

Ampere (Amp)

The unit used to measure the rate of flow of electric charge; 1 amp = 1 Coulomb/second.

Resistance

The property of a substance that limits the flow of current.

Ohm

The unit of resistance.

Ohm's Law

The relationship between voltage, current, and resistance: V = IR.

Electric Power

The rate at which electrical energy is used.

Power Formula

P = IV, where P is power, I is current, and V is voltage.

Kilowatt-hour (kW-hr)

A unit of energy commonly used by power companies.