While "induction flux" isn't a standard term in physics, it most likely refers to the magnetic flux that is involved in the process of electromagnetic induction.
Essentially, magnetic flux is a measure of the total magnetic field lines passing through a given area. The key phenomenon related to "induction flux" is not the flux itself, but the change in this flux over time.
Understanding Induction
Electromagnetic induction is the fundamental principle behind many electrical technologies. As highlighted by the reference:
As seen in previous Atoms, any change in magnetic flux induces an electromotive force (EMF) opposing that change—a process known as induction.
This means that if the amount of magnetic field passing through a loop or coil of wire changes, it will create a voltage (EMF) across that loop or coil. This induced voltage can then drive a current if there is a closed circuit.
How Magnetic Flux Changes to Cause Induction
The reference also notes that motion is one of the major causes of induction. Here are common ways magnetic flux changes:
- Moving a Magnet near a Coil:
- Example from reference: "a magnet moved toward a coil induces an EMF". When a magnet moves closer to or further away from a coil, the number of magnetic field lines passing through the coil changes.
- Moving a Coil near a Magnet:
- Example from reference: "and a coil moved toward a magnet produces a similar EMF." Similarly, moving the coil changes the area exposed to the magnet's field or changes the field strength it experiences.
- Changing the Magnetic Field Strength: If the source of the magnetic field (like an electromagnet) changes its strength, the flux through a nearby coil changes.
- Changing the Area: If a coil changes size or orientation relative to a magnetic field, the flux through it changes.
| Action | Effect on Magnetic Flux | Result |
|---|---|---|
| Moving magnet/coil relative to each other | Changes | Induces EMF (Induction) |
| Changing strength of magnet | Changes | Induces EMF (Induction) |
| Changing area/orientation of coil | Changes | Induces EMF (Induction) |
Why the Change is Crucial
The critical point is that the change in magnetic flux is what matters for induction. A constant magnetic flux, even if very large, does not induce an EMF. Only when the flux is changing does the induction process occur.
Therefore, while "induction flux" isn't a standard term, it describes the magnetic flux that is actively changing and causing the phenomenon of induction by generating an electromotive force.
