Electrical Engineering › Section Y · Time-varying fields, Maxwell's equations, and plane waves › Topic Y.5
The Maxwell-Faraday equation and displacement current
Two laws from the static world, Kirchhoff's voltage law and Ampère's law, break when fields change in time. Repairing them gives two of Maxwell's equations, and the repair to Ampère's law, the displacement current, is the term that makes electromagnetic waves possible.
In this topic
- Kirchhoff's voltage law as a field law
- The Maxwell-Faraday equation
- From a loop to a point: the curl
- Ampère's law and the capacitor puzzle
- Displacement current
- The Ampère-Maxwell law
- Worked example: a capacitor's displacement current
- Worked example: when is displacement current negligible?
- Common mistakes to avoid
- Key takeaways
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