a problem about GMR , don't know how they find (r)

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Amir_Masoud

Joined Jan 7, 2018
9
Hi guys , i'm new here and i have a question , how did they found the (r) in this problem? r means radius and radius is half of diameter !! what does 12 has to do with it?
 

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Amir_Masoud

Joined Jan 7, 2018
9
This is making me crazy guys!! in this example for finding r they used 1/12 again!!! and space between two conductors are 44 inches , why they used 45.6 for finding GMD ???
 

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