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Unformatted text preview: two essential nodcs, the node-voltage method is simplified. As an example, look at the circuit in Fig. 4-12. There are lhree cssential nodes in this circuit. which means that two simultaneous equations are needed. From these three essential nodes, a rcference node has bccn chosen ard two olher nodes have been latreled. But the 100 V source constrains the voltage betwcen node 1 aDd the retercnce node to 100 V This means rhat there is only one unknown nodc voltage (rr). Solution oflhis circuit thus involves onl]' a single node vollage equation at node 2i , 2 . , , 10 50 But rr = 100 V. so Eq.4.7 can be solved lbr tr. 1)2 = 125 V. Knowing riz, we can calculate the curent in every branch.You should ver-ify that the current into node 1 in lbc branch containing the independent voltage source is 1.5 A. 14.7) (4.8) 3 i t 6f) 2 A 8 0 4 ' , (...
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This note was uploaded on 07/05/2010 for the course EE 100 taught by Professor Boser during the Spring '07 term at Berkeley.
- Spring '07