For t > 0, determine the time t at which v = 7.5V in Figure P5.79, assuming DC steady state at t = 0?.


Analysis:

Follow the steps stated in Section 5.4.

Step 1— Steady-state response for t>0:

After the switch has been open for a long time, there is no source connected to the circuit. Therefore, there is no energy in the circuit:







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