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If there are b branches and n nodes, then how many node-voltage equations are required?(a) n(b) b+1(c) n-1(d) bThe question was posed to me in quiz.This intriguing question comes from The Node-Voltage Method Versus the Mesh-Current Method in chapter Techniques of Circuit Analysis of Electric Circuits

Answer»

The CORRECT answer is (C) n-1

The explanation is: If there are n nodes then n-1 nodal equations are required to DESCRIBE the circuit. BRANCHES do nothing in this case.



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