Definition
An electrical load in which the current leads the voltage in an alternating current (AC) circuit because the load behaves primarily as a capacitor — a component that stores energy in an electric field and opposes changes in voltage.
Plain English
A device or section of an electrical circuit that acts like a capacitor, causing the current to rise and fall slightly ahead of the voltage instead of in step with it.
Context Anchor
Seen in aircraft electrical-system discussions, especially when describing how avionics, power supplies, or other equipment affect an AC power source.
Derivation
Capacitive comes from the Latin capacitas, meaning 'capacity' or 'ability to hold.' A capacitor holds an electric charge, so a capacitive load is one that holds and releases charge as the voltage changes.
Why Pilots Care
Aircraft electrical systems must manage capacitive loads to maintain stable voltage and prevent alternator inefficiency or overheating.
Analogy
A capacitive load is a little like a small storage tank in a water line: when pressure first arrives, the tank takes in some water before the flow settles down.
Intuition Check
“Load” does not mean cargo weight here. It means something connected to the electrical system that uses or affects electrical power.
Example Sentence 1
The avionics power supply presented a capacitive load to the inverter, causing the current to lead the voltage.
Example Sentence 2
During preflight checks, the mechanic verified the capacitive load on the electrical system.