03.44: A circular parallel-plate capauo*y 9axj27l dcitor is connected to a battery in a circuit. The capacitor is fully charged before the battery is disc7*a 29oxul djyonnected 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 capa-iqc )r2; epqdcitor 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 following the removali;2-q eq)drcp 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 charyvyyiup- da 43 ,7y yq:gngf,8ged after being connected to a battery of voltage V. The battery then is disconnected and an insulating dielectric slab of constant K is inserted between the capacitor’s plates, fully filling the region. What is the vod7:g3- , i,aqp uyy84 yyvnfgyltage between the plates once equilibrium is established with the dielectric in place?

  15.45: A 6.00 μF parall4gahf/ hq ;,blal1 h7xel-plate capacitor is disconnected 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 the person whil 7gh 4;hbxh1 ,lqaa/fle inserting the dielectric?