Question

048
If the frequency of the emf generated by an
alternator revolving at 3000 rpm is 50 Hz
what will be the number of poles?
(A) 8
(C) 4
(B) 6
(D) 2​

Answer 1

Answer:

2 is the ans

Explanation:

2 is the answer d is the potion

Answer 2

Answer:

given = n = 3000rpm

            f = 50 Hz

to find  =  number of poles = ?

solution ,

N = 60 X f / n

N =  60 X 50 / 3000

N = 3000 / 3000  

N = 1      

the number of poles will be 1.