🔍 Key Concepts

• Construction of series-wound vs shunt-wound motors and how current flows through field and armature • How torque is produced in a motor when the supply is AC versus DC • Which single-phase motor types depend on induction effects that only work properly on AC

💭 Think About

• Think about which motor type has its field winding and armature in series and what happens if you replace AC with DC in that setup • Ask yourself: which of these motors relies on a shaded coil or phase-splitting to create a rotating magnetic field that only exists with alternating current? • Consider: which motor design is known as a universal motor, meaning it can run on both AC and DC?

✅ Before You Answer

• Identify which choice has the field and armature in series, allowing current and magnetic field direction to reverse together on AC without reversing torque • Eliminate motor types that rely mainly on induction and phase shift (like shaded-pole and split-phase) that require alternating magnetic fields • Recall from study materials which specific motor type is commonly used in portable tools and appliances that can be designed for both AC and DC operation