Definition 1 of 2
Definition
The flow of electrons through a conductor, measured in amperes (amps). Current is one of the three fundamental quantities in electrical circuits, along with voltage (electrical pressure) and resistance (opposition to flow).
Plain English
How much electricity is actually flowing through a wire at any moment. If voltage is the push, current is the amount of stuff moving because of that push.
Context Anchor
Seen in aircraft electrical-system discussions, ammeter indications, circuit breaker descriptions, and troubleshooting of lights, radios, batteries, and charging systems.
Derivation
From the Latin currere, meaning 'to run' or 'to flow.' The word was borrowed for electricity in the 1700s because early scientists pictured electrical charge as a fluid running through a wire, much like water running in a stream.
Why Pilots Care
Correct current flow keeps radios, lights, and instruments working; too little or too much can lead to system failures.
Analogy
Think of water moving through a hose. The current is like the amount of water actually flowing through the hose, not the pressure pushing it.
Intuition Check
Current does not mean “present-day” here. In this context, current means the flow of electricity through an electrical path.
Example Sentence 1
When the landing light was switched on, the ammeter showed an increase in current as electricity flowed to the bulb.
Example Sentence 2
High current draw from the landing lights reduced battery voltage during the night flight.