Question

Find VA and VB using Node-Voltage method in the given circuit.

(a) 2.5V, 3.6V

(b) 2.87V, 3.25V

(c) 2.65V, 3.47V

(d) 3.15V, 2.76V

I got this question during an interview for a job.

The origin of the question is The Node-Voltage Method and Dependent Sources and Some Special Cases topic in chapter Techniques of Circuit Analysis of Electric Circuits

Answer 1

Correct option is (b) 2.87V, 3.25V

To explain: Node A:  VA/2 + (VA-1)/2 + (VA-VB)/1 =2

           Node B:  (VB-2)/2 + (VB-VA)/1 =1

 By solving the above equations required voltages are obtained.