Definition
The SI unit of magnetic flux, equal to the amount of magnetic flux that, when linked with a single-turn coil, induces an electromotive force of one volt as the flux is reduced to zero at a uniform rate over one second. One weber equals one volt-second, or 10^8 maxwells.
Plain English
A weber is the standard unit used to measure the total amount of a magnetic field passing through a given area. It tells you how strong and how widespread the magnetic field is at that point.
Context Anchor
Seen in electrical and magnetism discussions, especially when studying generators, alternators, motors, and other aircraft electrical components.
Derivation
Named after Wilhelm Eduard Weber, a 19th-century German physicist who studied electricity and magnetism. The unit was adopted internationally in his honor, which is why it is always capitalized as a unit name even though SI unit names are normally lowercase.
Why Pilots Care
Pilots do not normally use webers in cockpit operation, but the term can appear in explanations of how aircraft electrical equipment produces or uses electricity.
Analogy
If a magnetic field were rainfall, the weber would measure how much total rain is falling through a window opening — both how heavy the rain is and how big the opening is.
Grounding Statement
Picture a coil of wire inside a generator: the weber measures the amount of magnetic field passing through that coil.
Intuition Check
Do not read Weber as a brand name or a component name here. In this context, a weber is a measurement unit for magnetic field amount.
Example Sentence 1
Magnetic flux in aircraft generator cores is measured in webers when calculating field strength.
Example Sentence 2
The circuit design accounted for a flux change of two webers under load.