Question 5Electricity & Electronics - Assistant Engineer

The correct answer is A) Slip rings. A three-phase wound-rotor induction motor has slip rings, which allow access to the rotor windings. This is a key difference from a squirrel-cage induction motor, which does not have slip rings and instead has a squirrel-cage rotor design. The slip rings enable adjustments to the rotor circuit, which can be used to control the motor's starting and speed characteristics. The other options are incorrect because they are either features that both types of induction motors can have (B and C) or a characteristic of DC motors, not AC induction motors (D).