(c17p74) A parallel-plate capacitor made of half-circular plates of radius 45 cm separated by 4.00 mm is charged to a potential difference of 800 volts by a battery. Then a sheet of Teflon film is pushed between the plates, completely filling the gap between them. How much additional charge flows from the battery to one of the plates when the Teflon film is inserted? Dielectric constant for some materials: mylar 3.1 polyethylene 2.6 polyvinyldifluoride 11. tantalum pentoxide 25. Teflon 2.1 A vacuum filled capacitor has capacitance Co. The same capacitor filled with a material characterized by the dielectric constant k will have the capacitance C = K CO