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a) The dimensions of a parallel-plate capacitor are all increased by a factor of six. By what factor does the capacitance change? (The dimensions refer to the length and width of a plate and the spacing between the plates.)

b) A typical capacitor in an MP3 player has C = 0.10µF. If a charge ±5.3µC is placed on the plates, what is the voltage across the capacitor?

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