At t = 0 the switch S is closed with the capacitor uncharged. If C = 40 ?F, ? = 50 V, and R = 5.0 k?, how much energy is stored by the capacitor when I = 2.0 mA?
A. 20 mJ
B. 28 mJ
C. 32 mJ
D. 36 mJ
E. 40 mJ
Answer: C
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