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Consider the figure shown below. Find the voltage (V) at node 3.(a) 4.5(b) 5.5(c) 6.5(d) 7.5I had been asked this question in semester exam.This interesting question is from Supernode Analysis in portion Methods of Analyzing Circuits of Network Theory

Answer»

Correct choice is (a) 4.5

For 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. AlsoV1-V2=10. On SOLVING above equations, we GET V3 = 4.5V.



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