\(i=\frac{\epsilon}{R}=\frac{N B \ell v}{R}\)
\(F=N(i \ell B)=\frac{N^2 B^2 \ell^2 v}{R}\)
\(\mathrm{W}=\mathrm{F} \times \ell=\frac{\mathrm{N}^2 \mathrm{~B}^2 \ell^3}{\mathrm{R}}\left(\frac{\ell}{\mathrm{t}}\right)\)
\(\mathrm{A}=\ell^2\)
\(\mathrm{~W}=\frac{(10 \times 10)(0.5)^2 \times\left(3.6 \times 10^{-3}\right)^2}{100 \times 1}\)
\(\mathrm{~W}=3.24 \times 10^{-6} \mathrm{~J}\)