Question

Find the current through 2Ω resistor after source is replaced in the below circuit.

(a) 4

(b) 3

(c) 2

(d) 1

I got this question in an interview for internship.

I need to ask this question from Reciprocity Theorem in chapter Useful Theorems in Circuit Analysis of Network Theory

Answer 1

Correct answer is (c) 2

The explanation: The circuit after source is replaced is

Total current from the source (It)=12/(3+(6│|2))=2.67A. Current through 2Ω resistor=2.67× 6/(6+2)=2A.