03.44: A circular parallel-plate capacitorx1 7i4k bm1py nc)lei3 is connected to a battery in a circuit. The capacitor is fully charged before the battery is disconnected from the c4nl7cii1)1 pkmeyb 3x ircuit. A uniform material of dielectric constant $κ$ is inserted between the plates of the capacitor, effectively filling the space between the plates. Let $U_old$ be the energy stored by the capacitor before the dielectric was inserted, while $U_new$ is the energy stored after the dielectric was inserted. The ratio of $U_new/U_old$ is

  11.42: A parallel-plate capacitor of capacitance C has an insulating ,l;i5ein8wu.nq 5uk5 uf8krn dielectric material of constant K filling the entire region between its plates. This capacitor now is connected to a battery of voltage V and is fully charged before the battery is disconnected. The capacitor stores energy U. Using insulating gloves, a person now removes the dielectric from the capacitor. After equilibrium is established following the 8nue,5 iq l85;wi5fnuruk. nkremoval of the dielectric, which one of the following choices best represents the energy stored by the capacitor in terms of U?

  14.47: An air-filled parallel-plate capacitor of cap(z.)g3 4 hjud7s ajtytacitance C is fully charged after being connected to a battery of voltage V. The battery then is disconnected and an insulating dielectric slab of constant K dt(s)4 7yut.hjz 3gajis inserted between the capacitor’s plates, fully filling the region. What is the voltage between the plates once equilibrium is established with the dielectric in place?

  15.45: A 6.00 μF parallel-pl8 1s6sft9xua/:umv yhate capacitor is disconnected from a 12 volt battery after being fully charged. A person now carefully inserts a dielectric material of co uv/6hy 1mxtuas 9fs8:nstant K= 2 so that it fills one-half of the space between the plates as shown. How much work was done by the person while inserting the dielectric?