2. The flux density distribution in the air-gap of a 50 Hz alternator is given by B = Bim sin0 + (Bim/3) sin 30. The armature winding, which can be assumed to be uniformly distributed, is a 3-phase, full-pitched winding with 120 turns per phase. If the total flux per pole is 0.1 Wb, calculate the rms value of the emf per phase and the form factor of the phase emf. (The form factor Kris defined as: E E + E; + Ej +... Ex - Eser +... 5 E + E; + E; +... 212 E + E, Es ... 3 5 , where Ex is the rms emf of the kth harmonics.)