🔍 Key Concepts

• Difference between shunt, series, and compound field windings in DC motors • How to recognize a shunt field (connected directly across the supply) versus a series field (in line with the armature current) on a schematic • Why a motor with both shunt and series windings is called compound

💭 Think About

• Look carefully at figure A and trace the current path from the positive line to the negative line. Which windings carry the same current as the armature, and which (if any) are connected across the supply? • Compare how the top field winding is connected in A versus B and C. Does A have only one main field type, or both series and shunt fields? • Think about which of the answer choices would require a clearly drawn series field labeled S1–S2, and whether that appears in figure A.

✅ Before You Answer

• Verify whether the top field winding in A is connected across the line (parallel with the armature) or in series with it. • Check if there is any separate winding labeled S1–S2 in figure A; if not, eliminate any choice that requires a series field winding. • Remember that an AC series motor schematic would not normally be drawn with interpoles and DC designations (A1, A2, F1, F2); confirm what that suggests about the motor type.