Advantages and
disadvantages of A.C. over D.C. :-

1. The
   generation of A.C. is found to be economical than that of D.C.
2. The
   alternating voltages can be easily stepped up or stepped down by using a
   transformer.
3. The
   alternating currents can be regulated by using a choke coil without any
   significant wastage of electrical energy.
4. The
   alternating voltages can be transmitted to distant places with only a
   very small loss in a.c. power.
5. Further
   a.c. can be easily converted into d.c. by using rectifiers.

1. The
   a.c. supply is more suidical and dangerous than d.c. in terms of shock
   received due to them.
2. The
   alternating current always flows on the outer layer of the wire. It is
   called skin effect. Due to this instead of a single thick wire used for
   d.c the specially designed wire consisting of a number of thin wire is
   used.
3. The
   alternating current can not be used in electrolytic processes such as
   electroplating, electrotyping etc.