A uniform electric field of magnitude 1.0 x 102 NC-1 exists between 2 conducting plates, one of which is positively charged and the other of which is negatively charged. The plates are 1.0 x 10-2 m apart.  a) calculate the magnitude of the potential difference between the plates. b) If a proton is moved from the positive plate to the negative plate, what is the magnitude of change in its electrostatic potential energy? c) if this device operates as a capacitor, how is it able to store electrostatic potential energy?

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