Resistive load: current in phase with voltage
For resistive loads, the apparent power is always the active power, because the reactive power is zero.
The "resistive load" is a resistor that does not cause a phase shift between current and voltage.
The power factor is cos = 1 The electrical unit is Ohm Ω.
The effective resistance of a resistive load is always the same - regardless of whether AC or DC voltage is applied.
Typical ohmic loads are:
- classic incandescent lamps
- Heating coils
- Stove tops
- Soldering irons
- Electric heaters