Question

In the figure given below, the value of Resistance R by Norton’s Theorem is ___________

(a) 40

(b) 20

(c) 50

(d) 80

I had been asked this question at a job interview.

My question comes from Norton’s Theorem Involving Dependent and Independent Sources in division Useful Theorems in Circuit Analysis of Network Theory

Answer 1

Right option is (b) 20

The best explanation: \(\frac{V_P-100}{10} + \frac{V_P}{10}\) + 2 = 0

Or, 2VP – 100 + 20 = 0

∴ VP = 80/2 = 40V

∴ R = 20Ω (By Norton’s Theorem).