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Consider the figure shown below. Find the voltage (V) at node 2.

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Consider the figure shown below. Find the voltage (V) at node 2.

(a) 3

(b) 4

(c) 5

(d) 6

I got this question in unit test.

My question is from Supernode Analysis topic in division Methods of Analyzing Circuits of Network Theory

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The correct answer is (b) 4

The explanation: Applying Super Node Analysis, the combined equation of node 1 and node 2 is (V1-V3)/3+3+(V2-V3)/1-6+V2/5=0. At node 3, (V3-V1)/3+(V3-V2)/1+V3/2=0. Also  V1-V2=10. On solving above equations, we get V2 = 3.72V ≈ 4V.

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