MODULUS / REFERENCE
Electrical quantities and formulas
Relationships between voltage, current, resistance, power and energy.
| Symbol | Value or formula | Description |
|---|---|---|
| Ohm's law | U=IR | Voltage, current and resistance. |
| Power | P=UI | DC circuit power. |
| Energy | W=Pt | Electrical energy over time. |
| Charge | Q=It | Charge through a conductor. |
| Reactance | Xₗ=2πfL | Inductive reactance. |
Values are provided for reference. Check the required unit system and conditions before engineering or laboratory use.