03.44: A circular parallel-plate capacitor is co,vj(kg cz61z cnnected to a battery in a circuit. The capacitor is fully charged bej1 z(k,c6v zgcfore 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 capacito7zl g7r) e2l ss aveiot6b.zlnoh(7;:r of capacitance C has an insulating 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 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 followl:);7 snzevo 7 zg2t(.ilse h7lo6 rbaing 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 capacitojk 6ua2j/tgwe xgou83qbx84y) s +x4lr of capacitance C is fully charged after being connected to a battery of voltage V. The battery then is disconnected and an injw6q3b a2l /ox t)k84jxu 4xgsg +eu8ysulating 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 die oecyx: p:snm55w2 1nsconnected 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 betweeno5cp ee5y m:2nwsn: x1 the plates as shown. How much work was done by the person while inserting the dielectric?