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A conducting rod of resistence r moves uniformely with a constant speed v. If the rod keeps moving uniformly, then the amount of force required is - A. `(vB^(2)l^(2))/R`B. `(2vB^(2)l^(2))/((R+r))`C. `(vB^(2)l^(2))/((R+r))`D. zero |
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Answer» Correct Answer - 3 F=IlB `=(vBl)/((R+r))lB` `=(vB^(2)l^(2))/((R+r)` |
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