03.44: A circular parallel-plate capacitor is connected o mbk s3c+ 3ybsq6va8yed-.r -to a battery in a circuit. .bokqs3 -v y3b-crem d+6 ysa8The capacitor is fully charged before 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-pl1u nei2y* jxpe6-u7 tq, xipy,ate 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 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 followii 7y* ,1j,e6qpentpuix x- u2yng 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 of qtxx)as--w 3-fk*od acapacitance C is fully charged after being connected to a batterykf 3d-w- *xt-sx)o aqa 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 paral cfs2tcjo cd28+vz6*)c, n w mef9ppf6lel-plate capacitor is disconnected from a 12 volt battery after being fully charged. A dfp t6j)czs,82mw + 9ep2n6fcvfco c*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?