03.44: A circular parallel-plate capacitor is connected to a battery in a circ(qv c,8jd yie9uit. The capacitor is fully charged beforee9qy d8j(vic , 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-plathcz(vw1 s/(p9se 7wm zyo.h:f e capacitor of capacitance 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 hefs/.(m ywpw s( ch:1v9zz7o 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 ox;kigq;/fxj /f 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 thj/;/gixxf q ;ke dielectric in place?

  15.45: A 6.00 μF parallel-plate capacitor is disconnected from a 12 volt 5cq cf q8sjy m pv37+:b2kzc9abattery 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 platescc5 pq3bz8 vjmy a:9fq c+27ks as shown. How much work was done by the person while inserting the dielectric?