Final answer:
The squirrel cage winding of a split phase motor is usually made of aluminum or copper, designed for efficient operation via electromagnetic induction.
Step-by-step explanation:
The rotor's squirrel cage winding of a split phase motor is typically made of aluminum or copper bars which are connected at both ends by rings of the same material. This design allows for an efficient and durable operation. The squirrel cage rotor operates based on the principle of electromagnetic induction where the rotating magnetic field induced by the stator causes currents in the rotor bars, thus creating a force that turns the rotor and drives the motor. This design is robust and commonly used in various power tools and appliances.