Help: Graffeo Ex. 53

applepieordie said:

Hi,

My challenge is Ex. 53 d) of the Graffeo book, 2016 printing. see attached photo.

The part where he says "now square it to get rid of the j"

Why is it not (3Rg)^2 = (0.48-j0.38)^2 ??

am I an idiot? Im being serious.

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rg1 said:

When we are stuck up in such situations we equate magnitude of impedances. This is actually he is doing. IZ1I =IZ2I. If it is not clear I will explain it in detail.

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rg1 said:

The following figure may make it clearer. 

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