Ohm's Law & Power Quick Reference — One-Page Bench Cheat Sheet | Printable PDF

The math that runs every repair — on one page.

Voltage, current, resistance, and power: four quantities govern every circuit on your bench. This one-page reference gives you the formulas, worked examples, and measurement technique to use them like a working technician — not a physics student.

What's inside:

- The V-I-R triangle and how to pull any formula from it instantly

- All six Ohm's law and power formulas with plain-language explanations

- Worked bench examples with real numbers: load currents, LED series resistors, power ratings

- The "across vs. through" measurement rule that saves multimeter fuses

- Unit prefix table so mA/kΩ/mV conversions stop causing wrong answers

- Good technician habits: predict the reading before you probe

Who it's for: beginner and intermediate electronics technicians, students, hobbyists, and repair professionals who want the fundamentals in a form they'll actually use at the bench.

Format: 1-page PDF, US Letter, print-ready. Instant download.

Part of The Circuit Toolkit's one-page reference series — practical electronics training from a working electrical engineer.

*Educational reference. DC resistive circuits shown; circuits simplified for education.*