Question

21.
A six pole generator with fixed field excitation
developes an e.m.f. of 100 V when operating
at 1500 r.p.m. At what speed must it rotate to
develop 120 V?
[AIIMS 2007]
(A) 1200 r.p.m.
(B) 1800 r.p.m.
(C) 1500 r.p.m.
(D) 400 r.p.m.​

Answer 1

Answer:

1800 rpm is the right answer