Please help with the following physics questions based upon the data below. Topic: The Charging/Discharging of a Capacitor. Reference : Sears, Zemansky, Young & Freeman Section 26.4 (12th edition)

t/s Iel HA Ial HA In (Ic/ MA) 40 - 36 20 34 - 32 3-53 40 28 - 26 3 - 33 60 - 22 3 - 18 80 20 - 20 3 100 16 - 16 2 0 77 120 - 14 2 . 64 140 12 - 12 2 . 48 160 10 -10 2 . 30 180 - 8 2.08 200 7 - 8 220 G - 6 1. 79 240 5 - 6 1. 61 260 -5 280 - 4 1.3 9 300 10 - 4 0.69 R [16]; S [3] On the same pair of axes plot graphs of I, against Ia against t. 19] Also plot a second graph of Ln(IduA) against t. [5] From the linear graph: gradient = [3] C = [3] DISCUSSION: 1. From your graph, is the charging of the capacitor truly exponential? Give a reason for your answer. [2] 2. Would the method used above be suitable to determine the capacitance of a capacitor that has a value of about luF? Justify your answer. [2)