- To find the instant at which switch is closed for transient-free response.
- For transient free response in an RC series circuit, the voltage source should be connected to the circuit at its zero crossing.
Here, at voltage source zero crossing,
cos(2to + pi/4) =0.
So, 2to+pi/4 = pi/2
This gives to=pi/8 = 0.3926s.
But the given answer is twice the answer I got i.e. 0.7852s.
Have I missed anything here?