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A capacitance balance is shown in the fi...

A capacitance balance is shown in the figure. The balance has a block pulley system attached on one side and a capacitor that has a variable gap width on the other side. Assume upper plate of the capacitor has negligible mass. When the separation between the plate is `1/(sqrt(5))` meter, the attractive force between the plates balances the pulley block system. Then find value of `V_(0)` in volts (EMF of battery). (Take area of the plate `=20/(3epsilon_(0))m^(2)`)

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