Eddy current loss in core of a transformer is
- A. Directly proportional to resistivity of core material
- B. Directly proportional to square of resistivity of core material
- C. Inversely proportional to square of resistivity of core material
- D. Inversely proportional to resistivity of core material
Answer: D. Inversely proportional to resistivity of core material
Explanation: Eddy current loss per unit volume is Pe = (π²·f²·Bm²·t²) / (6·ρ), which is inversely proportional to the electrical resistivity ρ of the core laminations.