03.44: A circular parallel-plate capacitor is connected to a battery in a ci*e* iy2t tl*j hg1 tqndde a3 4s;n0d+3wjxis-rcuit. The capacitor is fully charged before the battery is disconnected fried4xedhlan**ji 3t 2-gs *stjw1ntq +0 3;d yom 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 ca (y9e q crz7c+0aejdy8pacitance 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 following choices best represents the eej(z rdc+q8acy9 e07ynergy stored by the capacitor in terms of U?

  14.47: An air-filled parallel-plate capacitor of 5r4uqyv kw3l(7*k +c gud)nbn 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 region. What is the voltage between the plates once equilibrium is established with the qkc7k5nglu v3+d4u*r w(y) bndielectric in place?

  15.45: A 6.00 μF parallel-plate capacitor is disconnected from a 12 voltkjgr)h a7jm+1) dqz ;d battery after being fully charged. A person now carefully inserts a dielectric material of constant K= 2 so that it fills one-half of kqd;dh+a1rg j7mj) z) the space between the plates as shown. How much work was done by the person while inserting the dielectric?