1. in fig 1, how to calculate time constant for C1 & C2. What are other parameters included in C2. & what are initial current in C1 & C2 when charging just starts.
It is given by I= Vs-Vc/R (Let vc=0v initilally)
2. in fig 2, zener will keep 12 V across cap, assume R1=1M (in fig its 10k, ignore this value). While calculating initial current direct relation cannot be used. I=Vs-vc/R As current will be limited by R1 here.
How to find that
3. in fig 3 lets say I have a initial cap value =14v & voltage source=12V. In this I don't think cap will discharge as there no path left.
It is given by I= Vs-Vc/R (Let vc=0v initilally)
2. in fig 2, zener will keep 12 V across cap, assume R1=1M (in fig its 10k, ignore this value). While calculating initial current direct relation cannot be used. I=Vs-vc/R As current will be limited by R1 here.
How to find that
3. in fig 3 lets say I have a initial cap value =14v & voltage source=12V. In this I don't think cap will discharge as there no path left.
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