In a series-wound machine, the armature is connected in series with the field winding.

• A. In parallel with the field winding
• B. Across the supply with a resistor
• C. With the field winding isolated
• D. In series with the field winding

Answer: (D)

In a series-wound machine, the armature and the field winding share the same current path, so the current flowing through the armature is the same as that flowing through the field. This series connection means the field flux is directly tied to the armature current, which gives high starting torque and makes speed strongly dependent on load as the current changes. That’s why the armature is connected in series with the field winding. If the field were arranged differently, such as in parallel or across the supply with a resistor, the field current would not track the armature current, changing the machine’s characteristics away from a true series-wound configuration.