What is Torque?

Torque is the force acting on a pivot point under a lever arm (torque = force x lever arm).
The physical unit for the specification of torque is called Newton meter (Nm).

How is Torque created?
Torque is generated in an air gap (between the stator and the rotor). In the majority of
electrical machines (except reluctance motors) it is mainly generated by the force
exerted on the current conductors in the magnetic field (Lorentz force).