A 7.60 \mu F capacitor is charged by a 36.0 V battery. It isdisconnected from the battery and then connected to an uncharged4.90 \mu F capacitor (see the figure ).

Part A
Determine the total stored energy before the two capacitors areconnected.
U_1 =

Part B
Determine the total stored energy after they are connected.
U_2 =

Part C
What is the change in energy?
U_2-U_1 =

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Beverley SmithLv2

25 Sep 2019

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A 7.4 mu F capacitor ischarged by a 110 V battery (see the figure a) and then isdisconnected from the battery. When this capacitor C1 is thenconnected (see the figure b) to a second (initially uncharged)capacitor, C2, the final voltage on each capacitor is 20 V.
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Two capacitors, c1= 18.0 μf, and c2=36.0 μf are connected in series and a 12.0-V battery is connected across the two capacitors.

a) find the equivalent capacitance

b) find the energy stored in this equivalent capacitance

c) find the energy stored in each individual capacitor

d) show that the sum of these two energies is the same as the energy found in part b

e) will this equality always be true or does it depend on the number of capacitors and their capacitances?

f) if the same capacitors were connected in parallel, what potential difference would be required across them so that the combination stores the same energy as in part a

g) which capacitor stores more energy in this situation, c1 or c2?