When Stator and Rotor windings of a 2-pole rotating electrical machine are excited, each would produce a sinusoidal MMF distribution in the air gap with peak values  and respectively. The rotor MMF lags stator MMF by a space angle δ at any instant as shown in Figure. Thus, half of stator and rotor surfaces will form one pole with the other half forming the second pole. Further, the direction of torque acting on the rotor can be clockwise or counter-clockwise.

The following Table gives four sets of statements regarding poles and torque. Select the correct set corresponding to the MMF axis as shown in Figure