Question

In the following circuit, when R = 0 Ω, the current IR equals to 10 A. The value of R, for which maximum power is absorbed by it is ___________

(a) 4 Ω

(b) 3 Ω

(c) 2 Ω

(d) 1 Ω

I have been asked this question during an internship interview.

The doubt is from Thevenin Theorem Involving Dependent and Independent Sources topic in portion Useful Theorems in Circuit Analysis of Network Theory

Answer 1

Correct option is (c) 2 Ω

The explanation: The Thevenin equivalent of the circuit is as shown below.

Therefore from the figure we can infer that Rth = 2 Ω