Question: A small bead of mass m? and carrying a negative charge ? q? is constrained to move along a thin frictionless rod (Figure). A distance

A small bead of mass m?and carrying a negative charge ?q?is constrained to move along a thin frictionless rod (Figure). A distance L?from this rod is a positive charge Q. Show that if the bead is displaced a distance x, where x?L, and released, it will exhibit simple harmonic motion. Obtain an expression for the period of this motion in terms of the parameters L, Q, q, and m.

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