1. Which of the following statements regarding an idel single-phase transformer having a turn ratio of 1 : 2 and drawing a current of 10 A from 200 V A.C. supply is incorrect?
2. The maximum efficiency of a distribution transformer is
3. Which of the following protection is normally not provided on small distribution transformers?
4. Insertion of resistance in the rotcir of an induction motor to develop a given torque
5. The efficiency of a transformer will be maximum when