Eddy currents are produced in a material when it is
Correct answer: B. Placed in a time-varying magnetic field
- A. Heated
- B. Placed in a time-varying magnetic field
- C. Placed in an electric field
- D. Placed in a uniform magnetic field
Explanation
Eddy currents are circulating currents induced in a conductor when it is exposed to a changing magnetic field. The production of eddy currents is specifically associated with a time-varying magnetic field, as a static or uniform magnetic field does not induce circulating currents.
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About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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