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Eddy currents are reduced in transformer cores by:
AMaking the core solid and thick
BLaminating the core
CUsing a non-magnetic core
DIncreasing the operating frequency
Answer & Solution
Correct answer: B. Laminating the core
1. Eddy currents flowing in a solid conducting core dissipate energy as heat.
2. LAMINATING the core (thin sheets separated by insulator) breaks up the conducting paths and reduces eddy currents drastically.
3. Solid cores would lose huge power to eddy currents — never used.
_Source: NCERT Class 12 Physics Ch 6 §6.7 Eddy Currents_
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