03.44: A circular parallel-plate capacip0ltga b 8+yz6t46byitor is connected to a battery in a circuit. The capacitor is fully charged before bgy6z 4+bl i0pt6y8tathe battery is disconnected from the circuit. 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 dielectric u,oe9 kai)eo-o5zo1 pmaterial 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 removal of the dielectric, which one of the following choices best represents the energy stored by the capacitor i au)o-5, kepei9o1o ozn terms of U?

  14.47: An air-filled ppr;2v-6 fvseas i;nn +* deso)arallel-plate capacitor of capacitance C is fully charged after being cees2 np;6aosf*;i v )vr-sdn+onnected to a battery of voltage V. The battery then is disconnected and an insulating dielectric slab of constant K is 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-plate capacitor is d7/-yt8dkc de yisconnected from a 12 volt battery after being fully charged. A person now carefully inserts a dielectric material of constant K= 2 so that it fills one-half of the space between the plates as shown. How much 7/8dkyed-yt c work was done by the person while inserting the dielectric?