A horizontal wire of length 1 meter, placed perpendicular to the magnetic meridian, falls at a const

Question

A horizontal wire of length 1 meter, placed perpendicular to the magnetic meridian, falls at a constant speed of $30 \mathrm{~meter} / \mathrm{sec}$ at a place where the horizontal component of earth's magnetic field is 0.02 millweber/meter ${ }^{2}$. The potential difference between the ends of the wire is\

Professor PC Thomas Classes · Answer

$\varepsilon=\mathrm{Blv}$\ $=\mathrm{V}$ $$ \begin{aligned} \mathrm{B} & =0.02 \mathrm{~m} @ \mathrm{~Wb} / \mathrm{m}^{2} \ & =0.02 	imes 10^{-3} \mathrm{~Wb} / \mathrm{m}^{2} \ \mathrm{I} & =1 \mathrm{~m} \ & \ldots, \end{aligned} $$