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The core of a transformer is laminated because

1. the weight of the transformer may be reduced
2. rusting of the core may be prevented
3. ratio of voltage in primary and secondary may be increased
4. energy losses due to eddy currents may be minimised

Correct answer: energy losses due to eddy currents may be minimised

Solution

The core of a transformer is laminated to minimize energy losses caused by eddy currents, which are induced in the core material due to changing magnetic flux.

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