03.44: A circular parallel-plate capacitor is y ma87yxrob43connected to a battery in a circuit. The capacitor i7 m8a3xb4ory ys 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 capacitanceha.abgz jp4h(+5x ie1 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 volt pe.5zaixbjah h1+ 4g(age 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 io:c0g -t s1ipos fully charged after being is 0otc- 1g:opconnected 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 dielectric in place?

  15.45: A 6.00 μF parallel-plate capacitor is je(f);jx xcg7 (j6 27ixydoxndisconnected from a 12 volt battery after being 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. Howo )jxx;xgf67i7(2j xjd ny(ec much work was done by the person while inserting the dielectric?