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Answer Posted / roysayan01
Whenever current flows in a conductor it produces magnetic
field around the conductor and the opposite is also true ie
if a magnetic field is provided around a conductor current
starts flowing thro that conductor. So in
transformers/armatures when flux is induced in
secondaries/rotor a current starts flowing in them because
of the flux or magnetic field, this current is called eddy
current and the loss incurred due to this unwanted current
is called eddy current loss.
Lamination are done to reduce eddy current loss
Hope the Q is answered vividly.
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