A copper rod of mass `m` slides under gravity on two smooth parallel rails `l` distance apart set at an angle `theta` to the horizontal. At the bottom, the rails are joined by a resistance `R`. There is a uniform magnetic field perpendicular to the plane of the rails. the terminal valocity of the rod isA. `(mgR cos theta)/(B^(2)I^(2))`B. `(mgR sin theta)/(B^(2)I^(2))`C. `(mgR tan theta)/(B^(2)I^(2))`D. `(mgR cos theta)/(B^(2)I^(2))`

A copper rod of mass `m` slides under gravity on two smooth parallel r

1.	A copper rod of mass `m` slides under gravity on two smooth parallel rails `l` distance apart set at an angle `theta` to the horizontal. At the bottom, the rails are joined by a resistance `R`. There is a uniform magnetic field perpendicular to the plane of the rails. the terminal valocity of the rod isA. `(mgR cos theta)/(B^(2)I^(2))`B. `(mgR sin theta)/(B^(2)I^(2))`C. `(mgR tan theta)/(B^(2)I^(2))`D. `(mgR cos theta)/(B^(2)I^(2))`
Answer» Correct Answer - B

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