The total flux per pole in the air gap of 50 Hz AC generator is 0.069 Wb. If the flux density distribution is given by B = B, sin 0 + B3 sin 30+ B5 sin 50 where B3 = B andB, B and 0 is the angle measured from inter polar axis, then determine the rms value of emf per turn. The coil span is 4/5 th of a pole pitch. =