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Determine the Norton’s impedance seen from terminals ‘ab’.

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Determine the Norton’s impedance seen from terminals ‘ab’.

(a) 6∠90⁰

(b) 7∠90⁰

(c) 6∠-90⁰

(d) 7∠-90⁰

I have been asked this question in my homework.

This is a very interesting question from Norton’s Theorem in division Steady State AC Analysis of Network Theory

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Right choice is (c) 6∠-90⁰

The best explanation: The impedance between the points a and b with the source replaced by a short circuit is Norton’s equivalent impedance. The Norton’s impedance is Zab=(j3)(-j2)/((j3)-(j2))=6∠-90^oΩ.

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