Question

Find the thevenin’s impedance in the circuit shown below.

(a) 4.83∠-1.13⁰

(b) 5.83∠1.13⁰

(c) 4.83∠1.13⁰

(d) 5.83∠-1.13⁰

I have been asked this question in my homework.

My question is based upon Thevenin’s Theorem in portion Steady State AC Analysis of Network Theory

Answer 1

Correct choice is (a) 4.83∠-1.13⁰

Easiest explanation: The impedance is equal to the impedance seen into the network across the output terminals. ZTh = (j5-j4)+(3-j4)(4+j6)/(3-j4+4+j6) = 4.83∠-1.13⁰Ω.