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A parallel-plate capacitor has circular plates of diameter d, separated by distance x. There is no dielectric between the plates. If you want to make a second capacitor with plate separation x/2, with no dielectric, but having the same capacitance as the first, what should the diameter of the plates be?An emergency generator produces a 30 V output at a maximum current of 3.5 A. To use the output for household power. the voltage needs to be stepped up to 120 V. What will the maximum current output be