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Two parallel vertical metallic rails AB and CD are separated by 1 m. They are connected at the two ends by resistances R1 and R2 as shown in figure. A horizontal metallic bar PQ of mass 0.2 kg slides without friction with maintaining contacts with the rails, vertically downward under the action of gravity. There is a uniform horizontal magnetic field of 0.6 T perpendicular to the plane of the rails in the region. It is observed when the terminal velocity is attained, the powers dissipated in R1 and R2 are 0.76 W and 1.2 W respectively.The terminal velocity of the bar is nm/s. The value of n is (Take g=9.8m/s2) |
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Answer» Two parallel vertical metallic rails AB and CD are separated by 1 m. They are connected at the two ends by resistances R1 and R2 as shown in figure. A horizontal metallic bar PQ of mass 0.2 kg slides without friction with maintaining contacts with the rails, vertically downward under the action of gravity. There is a uniform horizontal magnetic field of 0.6 T perpendicular to the plane of the rails in the region. It is observed when the terminal velocity is attained, the powers dissipated in R1 and R2 are 0.76 W and 1.2 W respectively. The terminal velocity of the bar is nm/s. The value of n is (Take g=9.8m/s2)  |
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