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A capacitor is constructed of two concentric conducting cylindrical shells. The radius of the outer shell is 2.59x10^-3 m, and that the inner cylindrical shell is 2.45 x10^-3 m. When the cylinders carry equal and opposite charges of magnitude 1.54x10^-10 C, the electric field among the plates has an average magnitude of 4.60x10^4 V/m and is directed radically outward from the inner shell to the outer shell.

1. Determine the capacitance of this capacitor.

2. Determine the magnitude of the potential dissimilarity between the cylindrical shells.

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