Question: Two small beads having positive charges 3q and q are xed at the opposite ends of a horizontal insulating rod, extending from the origin to

Two small beads having positive charges 3q and q are fixed at the opposite ends of a horizontal insulating rod, extending from the origin to the point x = d. As shown in Figure, a third small charged bead is free to slide on the rod. At what position is the third bead in equilibrium? Can it be in stable equilibrium?

+9 +3g

+9 +3g

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