03.44: A circular paraov3;or8 hdym 1p q+bw7 3ad(jillel-plate capacitor is connected to a battery in a circuit. The capacitor is fully charged before the battery is disconnected from the circuit. A uniform material of dielectric constao+ wj radd3h vb 7;3mo1(yqp8int $κ$ 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+n,s1 i1k tfhf C has an insulating dielectric material of constant K filling the entire region between its plates. This capacitor now is connected tsin,t11f khf+o 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 energy stored by the capacitor in terms of U?

  14.47: An air-filled parallel-plate capacitor of capacitance C is fully charp jn2 zvxt87y;ged after being connected to a battery of voltage V. The battery then is disconnected and an insulat8j;72tn vzyxping 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 dielectric in place?

  15.45: A 6.00 μF parallel-plate capacitor is disconnected from a 12 s7 dw3d ez+9g146clj.bo tssvvolt battery after vd1e9tbz+j 6 s 47 .cwgsodl3sbeing 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 while inserting the dielectric?