What drives the rotation of the rotor in an AC motor?

The rotation of the rotor in an AC motor is driven by magnetic fields. In AC motors, alternating current flows through the stator windings, creating a rotating magnetic field. This rotating magnetic field interacts with the rotor, inducing a current in it and consequently generating torque. The magnetic forces between the stator and rotor are crucial for initiating and sustaining the rotor’s rotation.

Understanding the role of magnetic fields is essential because they are the primary mechanism that enables the conversion of electrical energy into mechanical energy in AC motors. Without these magnetic fields, there would be no induced currents or torque generated in the rotor, and thus, no rotation would occur.

The other options do not correctly describe the mechanism of how rotation is achieved within the motor. Direct current isn't utilized in the operation of an AC motor; it relies on alternating current. Electric shock isn't a factor in the operation of the motor but rather refers to an unintended electrical accident. While torque is a result of the interaction between magnetic fields and the rotor, it does not directly drive the rotation itself. The interplay of all these components is integral, but magnetic fields are the key drivers of rotor movement.