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The network shown in the figure is assembled with uncharged capacitors X,Y,and Z,with
,and
and open switches,S1 and S2.A potential difference Vab = +120 V is applied between points a and b.After the network is assembled,switch S1 is closed for a long time,but switch S2 is kept open.Then switch S1 is opened and switch S2 is closed.What is the final voltage across capacitor X?
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