Electrical energy

Definition

Electrical energy is the energy produced by the movement of electric charges. It can be converted into other forms of energy such as mechanical, thermal, and light energy.

5 Must Know Facts For Your Next Test

1. Electrical energy is typically measured in joules (J) or kilowatt-hours (kWh).
2. The potential difference (voltage) and current are crucial in determining the amount of electrical energy transferred.
3. Conservation of energy principles apply to electrical systems, meaning electrical energy can be transformed but not created or destroyed.
4. Ohm's Law ($V = IR$) relates voltage, current, and resistance in an electric circuit.
5. Power (P), which is the rate at which electrical energy is consumed or generated, is calculated using $P = IV$, where I is current and V is voltage.

Review Questions

• What are the units used to measure electrical energy?
• How does Ohm's Law relate to electrical energy?
• What does the conservation of energy principle state about electrical systems?

Related terms

Voltage: The potential difference between two points in an electric field, measured in volts (V).

Current: The flow of electric charge through a conductor, measured in amperes (A).

Resistance: The opposition to the flow of electric current, resulting in the conversion of some electrical energy into heat, measured in ohms (Ω).