A capacitor can be made from two sheets of aluminum foil separated by a sheet of waxed paperIf the sheets of aluminum are 0.34 m by 0.35 m and the waxed paper, of slightly larger dimensions, is of thickness 0.040 mm and dielectric constant 2.5, what is the capacitance of this capacitor? .nF
C [k Eo A] / d k dielectric constant 2.5 Eo permittivity of vacuum 8.85 10 ^ ( - 12) A 0.34 0.35 0.119 sq.m d 0.040 mm 1 m / 1000 mm 0.000004 m C 0.00000065821875 farad or C 0.00000065821875 10 ^ ( - 9) 658.21875 nF
