Capacitors C1 = 3450 nF and C2 = 700 nF are initially connected in parallel and

Question

Capacitors C1 = 3450 nF and C2 = 700 nF are initially connected in parallel and hold a combined charge of Qtoti = 783 nC. Find the charge on each capacitor Q1i Q2i and the total energy Utoti stored in the system. The capacitors are then disconnected and reconnected with their terminals reveresed, so that the positively charged side of C1 is now connected to the negatively charged side of C2 and vice versa. Find the total charge Qtotf and total energy stored in the final state. (Remember, the total charge one the entire capacitor is zero, but Q is how much positive and negative charge have separated.)

Explanation / Answer

Capacitors C1 = 3450 nF and C2 = 700 nF are initially connected in parallel and hold a combined charge of Qtoti = 783 nC. Find the charge on each capacitor Q1i Q2i and the total energy Utoti stored in the system. The capacitors are then disconnected and reconnected with their terminals reveresed, so that the positively charged side of C1 is now connected to the negatively charged side of C2 and vice versa. Find the total charge Qtotf and total energy stored in the final state. (Remember, the total charge one the entire capacitor is zero, but Q is how much positive and negative charge have separated.)


answers are : Q1i = 651 nC, Q2i = 132 nC, Utoti = 73.9 nJ, Qtotf = 519 nC, Utotf = 32.4 nJ

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