03.44: A circular parallel-plate capacitor is connecp) j -/8guwku m0fxno )hs;+nm qyaz)/qwy 33vted to a battery in a circuit. The capacitor is fully charged before the battery is disconnected from the circuit. A uniform materin8aqfu)+q- gux3o p0 mvykh s3mwz /y;j)/w)nal 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 capg)oif79td+/ ;wt9jipqt aju9acitor 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 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 stogo;a/w qju79ipt9f9td )ij+t red by the capacitor in terms of U?

  14.47: An air-filled parallel-plate capacitor of capacitance C is fullbqqq ,t9nvhrr v0ciw 6 06fu *6de2)uvy charged after being connected to a battery of voltage V. The battery then ivrehvut wq,icqnd) 6b*f2r 6 9006uq vs 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 disconnected from a 12 vo( 5:0mq 0zkxz5 rc4 crj+wpcr.o1dbn 9 jtxyv(lt 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 wm9b vqn04c0r51xo5( djprr(xtyw kz. c :jcz +as done by the person while inserting the dielectric?