A coil with turns and area is placed in a uniform magnetic field of

PHYSICS · Single correct · CBSE · Physics · Electromagnetic Induction · Electromagnetic Induction

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}

(b)

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

(c)

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

(d)

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