Question
Download Solution PDFWhat law explains the induction of eddy currents in the armature core?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Eddy currents are circulating currents induced in the core material of electrical machines due to a changing magnetic field. These currents are explained by Faraday's Law of Electromagnetic Induction, which states that a time-varying magnetic field induces an electromotive force (EMF) in a conductor.
Calculation
According to Faraday’s Law, when the magnetic flux through a conductor changes with time, an EMF is induced. In the armature core (which is a conductor), this changing flux causes localized currents—called eddy currents. Although Lenz's Law gives the direction of the induced current, the **induction** itself is explained by Faraday’s Law.
Other options: - Ohm’s Law relates voltage, current, and resistance—not induction. - Ampere’s Law relates magnetic field to current, not induced EMF. - Lenz’s Law gives direction, not the cause of EMF.
Final Answer: Faraday’s Law
Last updated on Jul 2, 2025
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