I'm having problem related to circuit which is presented bellow. I try to calculate a resultant capacitance of such circuit in case, where C is equal to 10 uF. I've connected this circuit physically, and according to measurements - searched capacity between point A and B is equal to 8.3 uF.
I've tried to calculate this circuit according to this post: Calculating effective capacitance of a circuit because I noticed, that my circuit is similar (in some part) to the capacitance bridge. According to my calculations, such effective capacitance have (3/4)*C = 7.5 uF, so there is some value mismatch, and I don't know why... I suspect, that there could be some calculation mistake or some parasitic, additional capacitances in physical circuit...
Could someone explain this mismatch ? I'll be quite greatful.