There is an insulator rod of length L and of negligible mass with two small balls of mass m and electric charge Q attached to its ends. The rod can rotate in the horizontal plane around a vertical axis crossing it at a `L//4` distance from one of its ends. In what position is the rod to be set so that if displaced a little from that position it begins a hormonic oscillation about the axisA?A. B. C. D.

There is an insulator rod of length L and of negligible mass with two

1.	There is an insulator rod of length L and of negligible mass with two small balls of mass m and electric charge Q attached to its ends. The rod can rotate in the horizontal plane around a vertical axis crossing it at a `L//4` distance from one of its ends. In what position is the rod to be set so that if displaced a little from that position it begins a hormonic oscillation about the axisA?A. B. C. D.
Answer» Correct Answer - A::D Position of option (A) is minimum PE position means stable equilibrium position. Any displacement from this position is opposed by restoring torque.

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