Most commercial compound dc generator are normally supplied by manufacturers as over compound machines because __________
(a) degree of compounding can be adjusted by diverters acrosss series field
(b) they have ideally best for HVDC
(c) cost effective than shunt
(d) zero percent regulation
The question was asked by my college professor while I was bunking the class.
The question is from DC Machine Applications topic in section DC Machines of Electrical Machines