railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrician and Wireman Electrical Machines Alternators

एक प्रत्यावर्तित्र में किसी प्रेरित ई.एम.एफ. (EMF) की आवृत्ति (f) _____ दी जाती है।

1
f = PN/120
2
f = 120N/P
3
f = 120P/N
4
f = 120/PN
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