03.44: A circular parallel-plate capacitor is conl98k*m ca 7d/sp+zpv onected to a battery in a circuit. The capacitor is fully charged before the battery is disconnected from the circuit. A uniform material of dielectric cons+alzcpv* ms 8k7dpo 9/tant $κ$ 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 capacito2;/;qw mu2bcqo n,,hn l2wi ccr 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 vwc2l,/q qmni c uh2w;o;2bn,coltage 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 parallel5w xk(lyw68nxd 1ls8h-plate capacitor of 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 capacitow( dlx nw6hk85yx1 l8sr’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 volt batte ,cv- 8ya9rboe(jxv6b*7vxir ry 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 y7co v,xj*9b(evv6 irab -rx8 shown. How much work was done by the person while inserting the dielectric?