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Electromagnetic Theory
Maxwell's equations
Use this for “Which of Maxwell’s equations explains why a magnet cut in two gives two magnets?”
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Which of Maxwell’s equations says this?
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Two equations say where fields come from; two say how a changing field makes the other.
Assumptions
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SI units, with the fields in vacuum: ε₀ and μ₀ are the only constants.
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The integral and the differential forms say the same thing: one about a surface or a loop, the other at each point.
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Two equations say where fields come from (charges, and no magnetic charges); two say how a changing field makes the other.
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