The core of a transformer is laminated because
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energy losses due to eddy currents may be minimised
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the weight of the transformer may be reduced
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rusting of the core may be prevented
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ratio of voltage in primary and secondary may be increased
A.
energy losses due to eddy currents may be minimised
When magnetic flux linked with a coil changes, induced emf is produced in it and the induced current flows through the wire forming the coil. In 1895, Focault experimentally found that these induced currents are set up in the conductor in the form of closed loops. These current look like eddies or whirl pools and likewise are known as Focault's current. These current oppose the cause of their origin, therefore, due to eddy currents, a great amount of energy is wasted in form of heat energy. If core of transformer is laminated, then their effect can be minimised.
