Question

Find the voltage across 24Ω resistor by using Thevenin’s theorem.

(a) 8V

(b) 9V

(c) 1V

(d) 6V

The question was posed to me in semester exam.

This is a very interesting question from Thevenin and Norton Equivalents,  More on Deriving a Thevenin Equivalent topic in portion Techniques of Circuit Analysis of Electric Circuits

Answer 1

Right choice is (a) 8V

The explanation: 1. Remove 24Ω resistor and calculate the voltage across the open circuit.

           2. Calculate the thevenin’s resistance and by using it, the thevenin’s current.

                     3. V24Ω=I*R     (can also verify by using Nodal analysis).