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Question:

Electric fields and capacitors.?

Two parallel sheets of aluminum foil separated by 0.1 mm are connected to a 9-V batteryThe area of each sheet is 0.5 sqm.(a)Find the electric field between the aluminum sheets.(b)Find the capacitance of the system(c)Find how much energy is stored in the capacitor.

Answer:

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E V/d 9/0.1x10^-3 90x10? N/C C εoA/d (8.85x10^-12)(0.5)/0.1x10^-3 C 44.25x10^-9 44.25 nF W 1/2 CV? 0.5(44.25x10^-9)(9?) 1.79x10^-6 J 1.79 uJ

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