03.44: A circular parallel-plate capacitor is connected to a battery in aa9s c8 ui n7tlf w4s,rqjo8p/9 circuit. The capacitpoc/s 8 ,f98ir t4ns9qajl7 uwor is fully charged before the 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 jqh3lv3 oi6jewz,v18dielectric material of constantlzqvvheo j 3, w8j1i63 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 in terms of U?

  14.47: An air-filled parallel-plate capacitor of capacitance C is fully ch9y;e 8+ xy5zjohbwg8 targed after being connected to a battery of voltage V. The battery then is disconnected and an insulat o5x+y 8eyth;9zj 8gbwing 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 disconnected from a 12 vj/++( a8g5jycyuuhvz8re ek:olt battery after bein8c5+(e 8ug kzh :er+jj/yvu ayg 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 the person while inserting the dielectric?