Question

The Norton’s equivalent impedance in the circuit shown below.

(a) 4.53∠9.92⁰

(b) 4.53∠-9.92⁰

(c) 5.53∠9.92⁰

(d) 5.53∠-9.92⁰

The question was posed to me by my school principal while I was bunking the class.

My question is from Norton’s Theorem in portion Steady State AC Analysis of Network Theory

Answer 1

The correct choice is (a) 4.53∠9.92⁰

The best explanation: The Norton’s equivalent impedance is Z = (3+j4)(4-j5)/((3+j4)+(4-j5))=4.53∠9.92^oΩ. The impedance between the points a and b with the source replaced by a short circuit is Norton’s equivalent impedance.