A copper disc of radius 0.1 m is spun about its centre at a steady rate 10 rev per sec. in a uniform

Question

A copper disc of radius 0.1 m is spun about its centre at a steady rate 10 rev per sec. in a uniform magnetic field of 0.1 T with its plane perpendicular to the field. The emf in volts induced across a radius of the disc is roughly\

Professor PC Thomas Classes · Answer

$\varepsilon=B \pi R^{2} n \quad B=0.1 T$\ $\mathrm{R}=0.1 \mathrm{~m}$ $$ =\mathrm{V} \quad \mathrm{n}=10 $$