1-A parallel-plate aircapacitor of area A = 17.3 cm2 and plate separation of d= 3.80 mm is charged by a battery to a voltage of 60.0 V. What is the charge on the capacitor?
2-If a dielectric material with κ = 3.90 is inserted sothat it fills the volume between the plates (with the capacitor still connected to the battery), how much additional charge will flow from the battery onto the positive plate?