MCQOPTIONS
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MCQOPTIONS
| 1. |
A conducting wire xy of length\[l\]and mass m is sliding without friction on vertical conduction rails ab and cd shown in Fig. A uniform magnetic field B exists perpendicular to the plane of the rails, x moves with a constant velocity of |
| A. | \[\frac{mgR}{Bl}\] |
| B. | \[\frac{mgR}{B{{l}^{2}}}\] |
| C. | \[\frac{mgR}{{{B}^{2}}{{l}^{2}}}\] |
| D. | \[\frac{mgR}{{{B}^{2}}l}\] |
| Answer» D. \[\frac{mgR}{{{B}^{2}}l}\] | |