A long non-conducting, massless rod of length L pivoted at its centre and balanced with a weight w at a distance x from the lefrt end. At the left and right ends fo the rod are attached small conducting sphers with positive charfges q and `2q` respectively. A distance h directly beneath each of these spheres is a fixed sphere with positive charge Q.
(a) Find the distance x where the rod is horizontal and balanced.b. What valueshold h have so that the rod exerts no vertical force on the bearing when the rod is horizontal and balanced?