RC discharge in two ways, solving for time constant

by Renzo M-Svartz   Last Updated October 16, 2019 03:25 AM - source

Are the two underlined equations at the bottom correct (can I calculate an equivalent resistance for the time constant)? I understand how to find voltage and current for each element at time t supplied with DC voltage. So I’m looking at discharging two ways. Are they both appropriately solved?

Also I've just understood Thevenin equivalent circuit(s) solutions to these circuits so I specifically want to know if the time constant can be calculated by an equivalence resistance. Thanks guys I'm excited about every second I'll be a part of this forum!

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