A 440 V, 4-pole, 25 kW, dc generator has a wave-connected armature winding with 846 conductors. The mean flux density in the air-gap under the interpoles is 0.5 Wb/m^2 on full load and the radial gap length is 0.3 cm. Number of turns required on each interpole is _________
(a) 74
(b) 84
(c) 64
(d) 54
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I would like to ask this question from Commutation Process -1 topic in section Commutation Process & Excitation Methods of DC Machines