Question

To reduce the iron losses in a transformer, the core must be made of a material having :

• A. low permeability and high resistivity
• B. high permeability and high resistivity
• C. low permeability and low resistivity
• D. high permeability and low resistivity

Answer 1

Answer: (B)

high permeability and high resistivity

To reduce the iron loses in a transformers, the core must be made of a material having high permeability and high resistivity because high permeability carry high magnetic flux, and high resistivity provides low conductivity which prevent eddy currents.