🔍 Key Concepts

• Split-phase single-phase induction motors construction and starting method • Differences between squirrel cage and wound-rotor induction motors • Which rotor designs are typically used in small fractional-horsepower AC motors

💭 Think About

• First, think about what kind of rotor is simple, rugged, and commonly used in small household or light-duty motors • Consider which rotor type normally requires external resistors or slip rings, and ask whether that matches typical split-phase motor construction • Ask yourself which rotor types are more common in large synchronous machines versus small induction motors

✅ Before You Answer

• Verify which rotor type is standard in most single-phase induction motors used in appliances and tools • Check whether split-phase motors usually have slip rings and external resistances or are completely enclosed and maintenance-free • Confirm which rotor design is associated with low cost and simple construction in induction motors