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If there are n nodes, then how many node-voltage equations are required?

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If there are n nodes, then how many node-voltage equations are required?

(a) n

(b) n+1

(c) n-1

(d) 1

The question was asked in my homework.

My query is from The Node-Voltage Method and Dependent Sources and Some Special Cases in division Techniques of Circuit Analysis of Electric Circuits

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Best answer
Right answer is (c) n-1

The best explanation: If there are n nodes then n-1 nodal equations are required to describe the circuit.

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