03.44: A circular parallel-plate capacirxzf wl8.e-ox 158wznws a( 7ytor is connected to a battery in a circuit. The capacar8el1w5ofn- s (w.8wzz7x x yitor is fully charged before 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 capacitor of capacitance4r mz korh4r )2kf8yg6 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 equilib k2)4yr48mr6h orgkfzrium 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 o wc-lkvq1ncdcv s446q b51(x capacitor of capacitance C is 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 regq (14o4 -q6vlxck1bsndccw5v ion. 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 a0vrqvhi)fx biw8 5ots)0030v)cj ordisconnected from a 12 volt battery after being fully charged. A person now carefully inserts a dielectric material of constant K= 2 so tha rt f00i 0a3jhboqw)rovsx5i)v8)vc0 t it fills one-half of the space between the plates as shown. How much work was done by the person while inserting the dielectric?