Eddy Current Questions | Refresh Understanding

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Eddy currents are generated in conductive materials when exposed to a changing magnetic field. Not all metals exhibit significant eddy currents; ferrous materials are preferred for induction cooktops due to their higher magnetic permeability. The heat produced by eddy currents is influenced by both the material's resistivity and the strength of the current. Metal detectors utilize the principle of eddy currents to detect metallic objects. Overall, understanding eddy currents involves recognizing the relationship between magnetic fields, material properties, and induced currents.
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Need to refresh my understanding on eddy current.
Does every metal exhibit eddy current when it comes across a Mag field?
If this is the case, then why do induction cook tops required ferrous utensils.
A Metal detector also works on the principle of eddy current. correct?
 
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There is quite a lot online about eddy currents, have you tried looking it up?
1. yes - provided the B-field changes
2. the heat depends on resistivity as well as current
3. yes - amongst others
 
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