1. The problem statement, all variables and given/known data Problem statement in image 2. Relevant equations 3. The attempt at a solution For this problem, I believe I am doing the math right, and getting infinite voltage at t=∞ However, in general there are so troubling facts to me in the problem statement. It is not so clear on the voltage boundaries. Also, I am not sure about these instantaneous voltage and current changes. I am so confused about my professor saying no instantaneous voltage change can occur. Okay, fine I know I(t) is proportional to dv/dt, and if dv/dt is infinite, then I(t) is infinite, which is not possible. However, how can you have anything other than an instantaneous change? I mean, how else does something change on a small enough scale other than instantaneously, isn't that the entire point of infinitesimal calculus?? What's it going to do, change gradually? How is that expressed? I would actually rather say yes to both parts (a) and (b), because obviously when the switch turned on, stuff instantly began happening, which means both of those changed instantly, but whats holding me back is this whole business about no instantaneous voltage changes being allowed. Does it mean at t < 0, V(t) = 20V, or is it t ≤ 0, V(t) = 20V then t > 0 is given by the function in the problem statement.