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rc time constant: At the circuit below detemine the ratio T2/T1 When T1 is the time...

rc time constant:
At the circuit below detemine the ratio T2/T1
When T1 is the time constant at t=0 when the swith is closed and T2 is the time constant afyer closing the switch.
Answer from the book is T2/T1 = 2


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