03.44: A circular parallel-plate capacitor is connected to a batm 95rqgwqlh 6 ka00ti/tery in a circuit. The capacitor is fully charged before the battery is disconnected from the circuit. A uniform material of dielectr0katr il0qg/9hm q5w6ic 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 capacitance6g(p 6z,*ygxwm nya9b 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 removal of the dielectric, which one of the fp,g6 zm y9x *a6gybw(nollowing choices best represents the energy stored by the capacitor in terms of U?

  14.47: An air-filled parallel-plate capacitor of capacitance C isjiesbh *( l6f* fully charged 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 voltage between the plates once equilibrium**jlbif(es 6 h is established with the dielectric in place?

  15.45: A 6.00 μF parallel-plate capacitor is disconceif:z sx2, (nvbwn( 1 cz-t-cnected from a 12 volt battery after being fully charged. A person now carefully insertn2 :, b ic1xcczn- zef(-vt(wss 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?