# Change in Frequency of Charged Ball's!

Two small identical balls lying on a horizontal plane are connected by a weightless spring. One Ball (Ball 2) is fixed at $$O$$ and the other (Ball 1) is free. The balls are charged identically as a resultant of which the spring length increases $$\eta = 2$$ times. Determine the change in the frequency (ratio of $$\frac{f}{f_0}$$).

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