How is the e.m.f. across primary and secondary coils of a transformer

  1. How is the e.m.f. across primary and secondary coils of a transformer related with the number of turns of coil in them?
  2. On which type of current do transformers work?

Answer

  1. e.m.f. and the number of turns of the coil are directly proportional.
  2. A.C. or alternating current.