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Statement of a problem № 3717

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Each of the two capacitors A and B of capacitances 1.0 and 2.0 nF, respectively, are charged initially by connecting them in turn to a 12 V battery. What is the final potential difference of the combination if the capacitors are later connected in parallel such that (a) the positive plate of one is connected to the positive plate of the other;(b) the positive plate of one is connected to the negative plate of the other.

Solution:
Each of the two capacitors A and B of capacitances 1.0 and 2.0 nF, respectively,

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