Question: Four parallel metal plates P1, P2, P3, and P4, each of area 7.50 cm2, are separated successively by a distance d = 1.19 mm, as

Four parallel metal plates P1, P2, P3, and P4, each of area 7.50 cm2, are separated successively by a distance d = 1.19 mm, as shown in Figure P26.55. P1 is connected to the negative terminal of a battery, and P2 to the positive terminal. The battery maintains a potential difference of 12.0 V.
(a) If P3 is connected to the negative terminal, what is the capacitance of the three-plate system P1P2P3?
(b) What is the charge on P2?
(c) If P4 is now connected to the positive terminal of the battery, what is the capacitance of the four plate system P1P2P3P4?
(d) What is the charge on P4?

Four parallel metal plates P1, P2, P3

P1 12.0

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