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Consider two parallel-plate capacitors, C1 and C2, that are connected in parallel. The capacitors are identical except that C2 has a dielectric inserted between its plates. A 115 V battery is connected across the combination until electrostatic equilibrium is established, and then the battery is disconnected.
(a) What is the charge on each capacitor? (Use the following as necessary: C1 and ?. Do not include the unit for the voltage in your answers.)
Q1 = 1
Q2 = 2
(b) What is the total stored energy of the capacitors? (Use the following as necessary: C1 and ?. Do not include the unit for the voltage in your answers.)
U =3
(c) The dielectric is removed from C2. What is the final stored energy of the capacitors? (Use the following as necessary: C1 and ?. Do not include the unit for the voltage in your answers.)
Uf =4
(d) What is the final voltage across the two capacitors? (Use the following as necessary: C1 and ?. Do not include the unit for the voltage in your answers.)
Vf =5
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