ok I got the answer but is the equation the same for the question shown below:
In the circuits shown below the switch has been opened for a very long time and closes at
t = 0. Calculate the output voltage VO at:
1: t = 0−; 2: t = 0+; 3: t = t1 = 5.6 µs; 4: t → ∞.
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No, the equation won't be the same for them. They will exhibit slightly different behavior. Pick one to analyze and describe what you think will happen when the switch closes.