Chapter 64 of 2364 min read

Motional EMF and eddy currents

Why this is asked: Eddy currents are the same phenomenon whether nuisance or feature: laminated transformer cores exist purely to suppress them, while electromagnetic braking and induction furnaces deliberately rely on them — NEET likes sorting a list into wanted versus unwanted.

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Test yourself

•A sheet is placed on a horizontal surface in front of a strong magnetic pole. A force is needed to: A. hold the sheet there if it is magnetic. B. hold the sheet there if it is non-magnetic. C. move the sheet away from the pole with uniform velocity if it is conducting. D. move the sheet away from the pole with uniform velocity if it is both non-conducting and non-polar. Choose the correct statement(s) from the options given below:

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