Ohm's Law

What is Ohm's Law?

V = IR — voltage across an ohmic conductor is proportional to the current through it. The constant of proportionality, resistance, is a property of the material and geometry rather than the applied voltage, which is exactly what makes the relationship linear.

The five clues

Engineerdle #1 described Ohm's Law with five clues, revealed one at a time from hardest to most direct. Each clue points at a different property of the concept.

1. 01Three variables, one triangle every student draws.
2. 02It only holds for a certain class of materials and components.
3. 03Rearranged, it gives you the value of the resistor you need.
4. 04V, I and R.
5. 05Named after a German physicist whose surname became a unit.

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