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The current I, as shown in the figure below, is ________(a) 3 A(b) 2 A(c) 1 A(d) 0The question was asked in quiz.Question is taken from Norton’s Theorem Involving Dependent and Independent Sources topic in section Useful Theorems in Circuit Analysis of Network Theory

Answer»

Correct option is (c) 1 A

The BEST EXPLANATION: The 3 Ω resistance is an extra element because voltage at node B is independent of the 3 Ω resistance.

I1 = \(\FRAC{3}{2+1}\) = 1 A(B -> A)

The net current in 2 Ω resistance is I = 1 – I1

= 2 – 1 = 1 A(A -> B).



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