engineering recuitment Indian Coast Guard Yantrik Mock Test 2024 Electrical Machines Alternator and Synchronous Motors
For eliminating 7th harmonic from the e.m.f. wave of an alternator, the fractional pitch must be
1
5 α
2
\(\frac{\alpha }{5}\)
3
\(\frac{7}{8}\)
4
\(\frac{6}{7}\)