Question

TWO 4.0 mm x 4.0 mm electrodes are held 0.10 mm apart and are attached to 7.5 V battery. Without disconnecting the battery, a 0.10-mm-thick sheet of Mylar is inserted between the electrodes. What is the capacitor's charge before the Mylar is inserted? Express your answer with the appropriate units. o o ? CHÅR Q= 4.955 • 10-11 C Submit Previous Answers Request Answer X Incorrect; Try Again; 2 attempts remaining Part D | Part E Part F What is the capacitor's charge after the Mylar is inserted? Express your answer with the appropriate units.

Answer 1

0. Dimension of electrode is 4mmx 4mm :. Area of electrode, A= (4x103)2 m² A = 16x10-6 m? Distance between blates, d= 0.1mm d: 0.1103 m the capacitance of capaciteer is given as, C=EA C = 8.85*10-12 x 16x10-6 F 0.310-3 C= 1.416x 10-12 F J the capacitor's charp before mylar's insertion is given as, o=cu V-7.50 O= 1.4166 10-12 x 7.5 c TQ - 1.062 x 10" CT : Capacitor's charge before mag. mylar's inserition is Q=1.062*10="c After Meyle is inserted, permittivity becomea, . ε = coer, For Mesylar, Er-3.1 . Capacitance after na Mylar is inserted © 3.1 1.4 16 x 10-12 4.38 x 1012

Since battery remains connected, potential across plater og capacitor, U-7.5U Charge stored, O=c'u O = 4.38 x 10-12x705 C 10 = 32.92x10-12 cl :. Capacitor's charge after Mylaris inserted Os 3.292 x10-"C