Why are transformer stamping annealed before being used for the building?
- A. to reduce eddy-current loss due to burning of edges
- B. to reduce hysteresis loss due to burning of edges
- C. to give mechanical strength to the core
- D. to increase core permeability
Answer: B. to reduce hysteresis loss due to burning of edges
Explanation: Punching strains the grain and raises hysteresis loss at the cut edges; annealing relieves this.