A metal wire of mass m slides without friction on two rails placed at a distance apart…
Physics · JEE Main · NTA Exams — Magnetic Effects of Current and Magnetism
A metal wire of mass m slides without friction on two rails placed at a distance \(\ell\) apart. The track lies in a uniform vertical magnetic field B. A constant current I flows along the rails across the wire and back down the other rail. The acceleration of the wire is
- \(\frac{\mathrm{BmI}}{\ell}\)
- \(m B I \ell\)
- \(\frac{\mathrm{BI} \ell}{\mathrm{~m}}\)
- \(\frac{\mathrm{m} \ell \ell}{\mathrm{~B}}\)
Answer
(C) BI ~m
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