In circuit, and out

A 10 kΩ resistor measures 909 Ω, and there is nothing wrong with it — or with the meter. The reading is correct about the network and useless about the part, and the difference between those two things is the single most important idea in component testing.

A free lesson from Ohmwork, played entirely in your browser on a real circuit solver — about 20 minutes.

Play this lesson in your browser — no download, no sign-up, and nothing you build is sent anywhere.

The full Ohmwork workshop — in development for Mac and Windows — carries 64 lessons across five courses, six simulated Arduino boards running real compiled sketches, an oscilloscope, and fault-finding practice.