A square coil of side 25 cm having 1000 turns is rotated with a uniform speed in magnetic field abou

Question

A square coil of side 25 cm having 1000 turns is rotated with a uniform speed in magnetic field about an axis perpendicular to the direction of the field. At an instant t , the e.m.f induced in the coil is $\mathrm{e}=$ $200 \sin 100 \pi \mathrm{t}$. The magnetic induction is\

Professor PC Thomas Classes · Answer

$\mathrm{e}=200 \sin 100 \pi \mathrm{t}$\ $	herefore e_{0}=200, \omega=100 \pi$\ $\because \mathrm{BAN} \omega=\mathrm{e}_{0}$,\ $	herefore \mathrm{B}=\frac{\mathrm{e}_{0}}{\mathrm{AN} \omega}=\frac{200}{(0.25 	imes 0.25) 	imes 1000 	imes 100 \pi}$\ or $\mathrm{B}=0.01 \mathrm{~T}$\