03.44: A circular parallel-plate capacitor is connected to a battery in a circ:gnb u5zqj / nc;s2c0juit. The capacitor is fully charged before the battery is disconnected from the circuit. A uniform material of die5uc0;:csbn2nj j /qgz lectric 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 m,l nxf/,j/gd 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 fully charged before the battery is disconnecteddmj,/n /x,fl g. 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 capacit,e29 k;x-)rzk h1w sm-il zmvf.hm/knor of capacitance C is fully charged after being connected to a battery of voltage V. The batterm. refh k) 2vmh-k i,kw-sx/z19m;nlzy 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 disconneg5 0nkv9c yu* tmmglylk*d3(-cted 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. How much work was done by the person while inserting tygvl-5 c*y*m m9ntl0ku(3 dkghe dielectric?