03.44: A circular parallel-plate capacitor is connected to a battery in a circuicm2cyc 0k;:v:n 9ksvm 9pnpb/t. The capacitor is fully charged before tbksv0; c: pc:9p2nmc9k/my vn he 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 capacitance Cz68jdz ztla *7a(l*rv 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 disconnected. The capacitor stores energy U. Using insulating gloves, a person now removes the dielectric from the capacitor. After equil(8z*jz7 a az6t lvl*rdibrium 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 cap qjj:p 0edf00ogb97c yacitor of capacitance C is fully charged after being con7yg9eb fjcpo 0:qd00j nected 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 d o,sg +kg b+9a2;iq;nv rj3zkis disconnected from a 12 volt battery after being fka b r3 di,;osqg;nz+9 g2+kjvully 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?