Electromagnetic Induction
Drop a magnet through a copper pipe and it falls slowly, as if the pipe were holding it back. A changing magnetic field makes an electric field, and the effects of that fact run every power station and every induction cooker. In this chapter you learn Faraday's law and Lenz's law, motional emf, eddy currents, self and mutual inductance, and how a generator works. Python simulates a coil turning in a field.
Part of Physics · High School (11–12) (chapter 20)
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Faraday's Law and Lenz's Law
How a changing magnetic field makes an emf. Magnetic flux, Faraday's laws of induction, Lenz's law and conservation of energy, and the emf in a rod moving through a field.
Eddy Currents and Inductance
Induction inside conductors and coils. Eddy currents and their uses, self-induction and the inductance of a solenoid, mutual induction, and the energy stored in an inductor.