A= 0.8m2 d= 20mm =201000 = 0.02m v =120v; εoA= 8.85×10−12fm−1 C = εoAd C =8.85×10−12×0.80.02 C= 3.54×10−10F Q= CV ⇒ 3.54×10−10 × 120 = 4.25×10−8c Q=42.5×10−9c = 42.5nC
