Air isn't a perfect electric insulator, but it has a very

Chapter 22, Problem 47

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Air isn't a perfect electric insulator, but it has a very high resistivity. Dry air has a resistivity of approximately 3 x !013 fl m. Acapacitor has square plates I 0 cm on a side separated by 1.2 mmof dry air. If the capacitor is charged to 250 V, what fraction of thecharge will flow across the air gap in I minute? Make the approximationthat the potential difference doesn't change as the charge flows.

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