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In the shown figure, there are two long ...

In the shown figure, there are two long fixed parallel conducting rails (having negligible resistance) and are separated by distance `L`. A uniform rod of resistance `R` and mass `M` is placed at rest on frictionless rails. Now at time `t = 0`, a capacitor having charge `Q_(0)` and capacitance `C` is connected across rails at ends `a` and `b` such that current in rod `(c d)` is from `c` towards `d` and the rod is released. A uniform and constant magnetic field having magnitude `B` exists normal to plane of paper as shown. (Neglect acceleration due to gravity)

When the acceleration of rod is zero, the speed of rod is :

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In the shown figure, there are two long fixed parallel conducting rails (having negligible resistance) and are separated by distance L . A uniform rod of resistance R and mass M is placed at rest on frictionless rails. Now at time t = 0 , a capacitor having charge Q_(0) and capacitance C is connected across rails at ends a and b such that current in rod (c d) is from c towards d and the rod is released. A uniform and constant magnetic field having magnitude B exists normal to plane of paper as shown. (Neglect acceleration due to gravity) When the acceleration of rod is zero, the charge on capacitor is:

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