strength of the air is exceeded and a spark (lightning) results? A parallel-plate capacitor is made from two aluminum-foil sheets, each 3.00 cm wide and 10.0 m long. Between the sheets is a mica strip of the same width and length that is 0.0225 mm thick. What is the maximum charge that can be stored in this ca- pacitor? (The dielectric constant of mica is 5.4, and its dielectric strength is 1.00 x 10% V/m.)