Anytime electrons (electricity) flows through something conductive an electromagnetic field is produced ....that's literally all it is!!!
Where you have lots of electron flow at high amperage...like a high tension power line....you have a big electromagnetic field.
Or an electromagnetic field can be very small such as produced by the batteries in a Childs toy.
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Yes I Am a Pirate! 200 years too late....the cannons don't thunder...there's nothing to plunder...I'm an over 40 victim of fate!
Maybe we're all here because we ain't all there????
If you're lucky enough to have been born in TEXAS....you're lucky enough!
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