When speed of an alternator is changed from 3600 R.P.M. to 1800 R.P.M. the generated e.m.f. per phase will become- [BREB-03]

When speed of an alternator is changed from 3600 R.P.M. to 1800 R.P.M. the generated e.m.f. per phase will become- [BREB-03]

A One half

B Twice

C 4 times

D one-fourth

Solution

Correct Answer: Option A