Q. 46 When stator and rotor windings of a 2-pole rotating electrical machine are
excited, each would produce a sinusoidal mmf distribution in the airgap with
peal values
and 
respectively. The rotor mmf lags stator mmf by a space
angle
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 set of statement as regards poles and torque. Select
the correct set corresponding to the mmf axes as shown in figure.
Answer:(C)
Explanation:
