03.44: A circular parb: 8 lre -rcsx9y)s-vrallel-plate capacitor is connected to a battery in a circuit. The capacitor is fully charged before the battery is disconnected from the circuit. A unifoys-e)8 blrx-vs9c:rr rm 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 ap)s +mbzv8jni ysj/5vwyo ;( ,n insulating dielectric material of constant K filling the entire region between its plates. This capacitor now is connected to a battery ofpjzmy/i ( y v+,o js)5n;swbv8 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 chargen6(1tacv/ w6h1lp-fzyb0yu b,o 4 qeed after being connected to a battery of voltage V. The battery then is va6nu014q- obbe,y/1 zc(lyhfwt 6 pedisconnected 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 csl-q v,ozi)a k8o51ggapacitor is disconnected from a 12 volt battery after being fully charged. A person now carefgs, q8oz1o5 vgikla)-ully 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?