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Nancy Drew 27: The Deadly Device Hints
"V=IR"
1 of 4: You can find this formula on the whiteboard in Mason's office.
2 of 4: It looks like a formula, but in fact it's not; it's a shorthand version of a fundamental law of electricity. If you're a ham or an electrical engineer, you already know what it's called. If not --
3 of 4: -- I'll tell you that it's called Ohm's law. So the book it refers to is --