E=I*R and P=I*E. Those things never change.
If EVER I've felt STUPID, it was after reading that. Oy!
To: Brad's Gramma
Don't feel stupid. It's so simple, I could teach it to your grandchildren. EIR and PIE. Then a demo about what e is (always fun for me), r is (less fun for the kids), and they gain an intuitive understanding of the relationship between voltage, resistance and current.
Most children survive that training method.
I can teach Ohm's law in about an hour where local laws don't prohibit it.
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