Electrical energy E = V I t is energy transferred by voltage and current over time. Power P = V I is the rate of energy transfer. Energy can be stored in capacitors (electric field) and inductors (magnetic field).
Electrical calculators
E = VIt, P = VI, capacitor, inductor, Joule heating
⚡ Electrical visualization
| Concept | Formula | Typical Use |
|---|---|---|
| Electrical energy | E = V I t | Energy = voltage × current × time |
| Electrical power | P = V I = I² R = V² / R | Joule heating / power dissipation |
| Energy dissipated as heat in resistor | E = I² R t | Joule's law |
| Energy in capacitor | E = ½ C V² | Stored in electric field |
| Energy in inductor | E = ½ L I² | Stored in magnetic field |
About electrical energy
Electrical energy E = V I t represents energy transferred by voltage and current over time. Power P = V I is the instantaneous rate of energy transfer. In resistors, energy is dissipated as heat (Joule heating: E = I² R t).
Energy storage
Capacitors store energy in electric fields: E = ½ C V². Inductors store energy in magnetic fields: E = ½ L I². Both can release this stored energy back into circuits.
SI units
Energy: joule (J). Power: watt (W) = J/s. Voltage: volt (V). Current: ampere (A). Resistance: ohm (Ω). Capacitance: farad (F). Inductance: henry (H).