What creates the interaction between the rotor and stator in an A-C motor that causes rotor rotation?

What creates the interaction between the rotor and stator in an A-C motor that causes rotor rotation?

• A. Electrical currents
• B. Magnetic fields
• C. Mechanical forces
• D. Friction

Answer: (B)

The interaction between the rotor and stator in an A-C motor that causes rotor rotation is primarily due to magnetic fields. In an alternating current (A-C) motor, the stator generates a rotating magnetic field when electrical currents flow through its windings. This rotating magnetic field interacts with the rotor, which is typically made of conductive material or contains permanent magnets. As the magnetic field from the stator rotates, it induces a magnetic field in the rotor due to electromagnetic induction. This induced magnetic field interacts with the stator's magnetic field, producing a force that causes the rotor to turn. The rotation continues as long as the A-C supply is maintained and the magnetic fields are present. Understanding this interaction highlights the fundamental principle of electromagnetic induction and the behavior of AC motors, making magnetic fields the key factor in facilitating rotor movement.

The interaction between the rotor and stator in an A-C motor that causes rotor rotation is primarily due to magnetic fields. In an alternating current (A-C) motor, the stator generates a rotating magnetic field when electrical currents flow through its windings. This rotating magnetic field interacts with the rotor, which is typically made of conductive material or contains permanent magnets.

As the magnetic field from the stator rotates, it induces a magnetic field in the rotor due to electromagnetic induction. This induced magnetic field interacts with the stator's magnetic field, producing a force that causes the rotor to turn. The rotation continues as long as the A-C supply is maintained and the magnetic fields are present.

Understanding this interaction highlights the fundamental principle of electromagnetic induction and the behavior of AC motors, making magnetic fields the key factor in facilitating rotor movement.