A non conducting rod of lenght 'l ' is pivoted at its centre with a weight 'w ' at a distance X from the left end of the rod. At the ends of the rod are attached small conducting spheres with charge q and 2q which lie at distance 'r ' from the fixed charges Q . Find X=?(Please answer in detail)
Just balance the torque for all of the forces about the pivot.
Two are the coloump force of repulsion.
The balancing of torque about the pivot will give u the answer in single step.
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