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For the circuit shown in figure below, the value of the Thevenin resistance is _________(a) 100 Ω(b) 136.4 Ω(c) 200 Ω(d) 272.8 ΩI got this question by my college director while I was bunking the class.This interesting question is from Thevenin Theorem Involving Dependent and Independent Sources topic in chapter Useful Theorems in Circuit Analysis of Network Theory

Answer»

The correct ANSWER is (a) 100

Explanation: IX = 1 A, VX = Vtest

Vtest = 100(1-2IX) + 300(1-2IX – 0.01VS) + 800

Or, Vtest = 1200 – 800IX – 3Vtest

Or, 4Vtest = 1200 – 800 = 400

Or, Vtest = 100V

∴ RTH = \(\frac{V_{test}}{1}\) = 100 Ω.



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