Question: Two small beads having positive charges q1 = 16q and q2 = q are fixed at the opposite ends of a horizontal insulating rod of

Two small beads having positive charges q1 = 16q and q2 = q are fixed at the opposite ends of a horizontal insulating rod of length d = 1.50 m. The bead with charge q1 is at the origin. As shown in the figure below, a third small, charged bead is free to slide on the rod.
91 x d 92 + x

(a) At what positionxis the third bead in equilibrium?
x=m

(b) Can the equilibrium be stable?

91 x d 92 + x

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