03.44: A circular parallel-plate capacitor is connected to a battery in a circui3/d v;ghqz:*4+q ha4inse jrb t. The capacitor is fully charged before the ba+ganqvb 4 hzs qrj/*ei4;h 3:dttery 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 insulati bbjuwpe0*48ang 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 f0pb8b*4e waj uully 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 in terms of U?

  14.47: An air-filled parallel-plate capacitor of capacitancbs1-sv+kga 1v e C is fully charged after being connected to a battery of voltage V. The battery then is disconnected and v1vs +gas- k1ban 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 d4+dbf rml06tvcfcv;y nwl 4;* isconnected 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 betwe;4 l4cfcnwdb;6 m*l0rvyt+fven the plates as shown. How much work was done by the person while inserting the dielectric?