Question

In the figure given below, the Norton Resistance, as seen at the terminals P-Q, is given by __________

(a) 5 Ω

(b) 7.5 Ω

(c) 5 Ω

(d) 7.5 Ω

This question was posed to me during an online interview.

I want to ask this question from Norton’s Theorem Involving Dependent and Independent Sources in chapter Useful Theorems in Circuit Analysis of Network Theory

Answer 1

Correct choice is (a) 5 Ω

Easy explanation: For finding VN,

VN = \(\frac{4 × 10}{10+10}\) = 2V

For finding RN,

RN = 10 || 10

= \(\frac{10×10}{10+10}\) = 5 Ω.