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From: sidney@coed.coastal.ufl.edu
Newsgroups: sci.electronics
Subject: Re: Why sqrt(-1)=j and not sqrt(-1)=i
Message-ID: <00947E99.1F92FD80@COED.COASTAL.UFL.EDU>
Date: 30 Apr 91 21:27:47 GMT
References: <1139@helps.cactus.org>
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Reply-To: sidney@coed.coastal.ufl.edu
Organization: Cosatal and Engineering Department
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>
>In math the sqrt(-1) is representated by the letter i.  In electronics
>why is the letter j used to represent the square root of -1?
>
>Thanks for any replies, posted or Emailed.
>
The letter i is used to represent current flow in Electrical 
Engineering  ie.  E=I*R  so another letter character is needed
to represent sqrt(-1)  and j was chosen.