The Faraday-Neumann-Lenz law links the circulation of the electric field to the change in magnetic flux. From a practical standpoint, the derivative of the flux acts as a fictitious generator to be inserted into Kirchhoff’s equations. A five-step protocol allows any induction problem to be tackled.
- Circulation of E and the Faraday-Neumann-Lenz law
- The fictitious generator
- Framework for solving an induction problem
Try it — interactive simulation
Move the magnet in and out of the coil: the changing flux drives an induced EMF, larger the faster the motion.