03.44: A circular parallel-plate capacitor is c1 s)x7tp+zvvrormym3 h: ew //onnected to a battery in a circuit. The capacitor is fully charged before the+ 3 y 7)votmxpm:v/es1 r/wzhr 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 uyuevvux(l.v2j3 .8u C has an insulating dielectric material of constant K filling the entire region between its plates. 2yv8xev uu.v3(luju. 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 in terms of U?

  14.47: An air-filled parallel-plate capacitor of capacitance C isc7sx(mk 0b1 c6 jhj3qx fully charged after being connected to a battery of voltage V. The battery then is disconnected and an insulating dielectric slab of consthj6bs(q 3 7j1 mccx0xkant 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 disconne n1)n5o,5 w:w ibuldfzcted 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 work was done by thuz )wnlfoind:51wb5,e person while inserting the dielectric?