When a compound wound DC motor is differentially compounded, what does this mean?

Correct Answer: Option C — The current flow direction in each series-field coil is in the opposite direction as the current flow direction in its corresponding shunt-field coil, in which case the field fluxes are subtractive.

Under USCG National Maritime Center examination standards, the accepted correct answer is: The current flow direction in each series-field coil is in the opposite direction as the current flow direction in its corresponding shunt-field coil, in which case the field fluxes are subtractive..