Question

050. The field coils of D.C. generator are usually
made of
(A) Mica
(B) Copper
(C) cast iron
(D) Carbon​

Answer 1

Answer:

Coils are typically wound with enamelled copper wire, sometimes termed magnet wire. The winding material must have a low resistance, to reduce the power consumed by the field coil, but more importantly to reduce the waste heat produced by ohmic heating.