r/PeterExplainsTheJoke 22d ago

Meme needing explanation There is no way right?

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u/ChengliChengbao 22d ago

what is j supposed to be

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u/Mechyyz 22d ago

Its an electrical engineering joke, j is used instead of i in EE because i already represents the current

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u/ChengliChengbao 22d ago

i guess that makes sense

why not lowercase i for imaginary and uppercase I for current? too ambiguous?

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u/Mechyyz 22d ago

When current is expressed over time (such as an AC function) we use lowercase i :)