A sinusoidal current sheet in a rotating electrical machine has peak value along q-axis. The peak value of sinusoidal MMF would be ___________
(a) in phase with current peak
(b) 90° lagging the current peak
(c) 90° leading the current peak
(d) may lag or lead depending upon the type of machine
The question was asked in a national level competition.
Question is taken from MMF Produced by Distributed Windings in chapter Synchronous Machines of Electrical Machines