FNIRSI on Instagram: "Copper wire resistance is lower than you think. Most multimeters simply can’t measure milliohms accurately. Here’s a practical method using Ohm’s law — apply a stable current, measure voltage, and get the real value. If you work with electronics, wiring, or repairs, this saves a lot of guesswork. Save this for your next test 🔧 #fnirsi #lowresistance #ohmslaw #copperwire #electronics #electronicrepair"