i'm confuse about the difference between the two connections below. Is it they both outputted the same output voltage and just right side is more costly than left side? Am i correct?
I think you are asking about the DC output values rather than the RMS values. Stated as DC (or average values) these would be correct.
In any case the the obvious clue is that the bigger the input voltage then the bigger the output voltage. Which circuit has the greater AC input voltage?
the right hand side would have bigger AC voltage. So the right hand side would have bigger DC. After my calculation, if consider Vac on left is 13.9Vac and Vac on right is 27.8Vac. then my DC for left is 12.5-1.4V=11.1Vdc and for the right side is 25-1.4V = 23.6Vdc. Am i correct?