Q. The flux-density distribution produced in a two - pole synchronous generator by an acexcited field winding is
B(θ, t) = Bm sin ω1t cos θ
Find the nature of the armature voltage induced in an N-turn coil if the rotor (or field) rotates at ω2 rad/s. Comment on the special case when ω1 = ω2 = ω.