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- Homework Statement
- To find the instant at which switch is closed for transient-free response.

- Relevant Equations
- 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(2t

_{o}+ pi/4) =0.

So, 2t

_{o}+pi/4 = pi/2

This gives t

_{o}=pi/8 = 0.3926s.

But the given answer is twice the answer I got i.e. 0.7852s.

Have I missed anything here?