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Faraday's law of induction is a fundamental principle of electromagnetism that describes how a changing magnetic field can induce an electromotive force (EMF) in a circuit. Formulated by Michael Faraday in the 19th century, the law can be stated in two primary ways: 1. **Mathematical Formulation**: The induced EMF (ε) in a closed loop is proportional to the rate of change of the magnetic flux (Φ) through the loop.