Question 48

A 4 - pole, 1500 r.p.m. alternator kill generate e.m.f. at :

Solution

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N = $$\frac{120f}{p}$$

where 

N = r.p.m

f = emf induced

p = number of poles

1500 = $$\frac{120f}{4}$$

f = 50 Hz

So, the answer would be option d)50 Hz

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