A conducting wire of mass \( m \) slides down two smooth conducting bars, set at an angle \( \th...

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A conducting wire of mass \( m \) slides down two smooth conducting bars, set at an angle \( \theta \) to the horizontal as shown in figure. The separation between the bars is \( l \). The system is located in the magnetic field \( B \) perpendicular to the plane of the sliding wire and bars. The constant velocity of the wire is
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