03.44: A circular parallel-plate capacitor is connecte;qkw z; mjb4-i ogg4n.d to a battery in a circuit. The capacitor is fully charged before the battery is disconnec n4k; -jq4ozm .wgb;igted 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 4y2qw 3y4/o xvxj 2rojinsulating dielectric material of constant K filling the entire region between its plates. This capacitor now is connected to a battery of vojwxo jy2y42ro3q/ vx 4ltage 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 chq1yjw4dc i;-p;;ci mt arged 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 c4 i;1mjw q ;c;itcp-ydapacitor’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-platemem6k7+qua +w+.zmx 9yt(cm u capacitor is disconnected from a 12 volt battery after being fully charged. A person now carefully +u mae7m+(cqmxtw9z6mu+ky. 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?