# Question about Electric Generators (and Black emf)

1. Feb 5, 2008

### predentalgirl1

An ac generator with a maximum emf of 400 V is to be constructed from wire loops (radius 0.15 m). It will operate at a frequency of 60 Hz and use a magnetic field of 200 mT. How many loops will be needed?

Given that,
Maximum emf = 400 V