Physics

Problem

A coil with

N=400

turns and area

250\,\text{cm}^2

is placed in a uniform magnetic field of

0.25\,\text{T}

. Determine the minimum rotational speed (in rev min

^{-1}

) required to generate

220\,\text{V}

rms across the coil. a)

\;600\,\text{rev\,min}^{-1}

\;840\,\text{rev\,min}^{-1}

\;1200\,\text{rev\,min}^{-1}

\;2400\,\text{rev\,min}^{-1}