Question

Eddy current can be minimised by

• A. using a laminated iron core
• B. moving the conductor rapidly
• C. moving the conductor slowly
• D. using a metallic core

Answer 1

The correct option is A using a laminated iron core

Electrons cannot cross the insulating gap between the laminations and so are unable to circulate on wide arcs. Charges gather at the lamination boundaries, in a process analogous to the hall effect, producing electric fields that oppose any further accumulation of charge and hence suppressing the eddy currents.