1.

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

Answer» Correct Answer - 3
F=IlB
`=(vBl)/((R+r))lB`
`=(vB^(2)l^(2))/((R+r)`


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