03.44: A circular parallel-plate capacitor is connected to qdn n0h ajwoy t06. 2b;/dr:vna battery in a circuit. The capacitor is fully charged before the battery is disconnected from the circuit. A uniform material of dielectric constant dta;0wj dn /0yo h.n qr2:nbv6$κ$ 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 capac j z eil1,0e8h70*bhz ss5mnuoitor of capacitance C has an insulating dielectric material of constant K filling the entire region between its pjzs,hh eni8* 1z ou75lms0 be0lates. 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 energy stored by the capacitor in terms of U?

  14.47: An air-filled parallel-plate capacitor of cap 321rurkz(r;/d tzxahacitance 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 cahr k 3(atr;2uzdxz/1rpacitor’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 v)9d2e i *r s9knvf tnov1xrz93olt battery after being fully charged. A person now carefully inserts a dielectric material of constant K=91r osvk z*9 e)tvd9f 3ni2nrx 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?