Cold vs Hot Resistance Explained in Simple Terms

Temperature Coefficient of Resistance Explained | The difference between cold and hot resistance In this video, we break down a common beginner confusion in electronics. Using a real experiment with a bench power supply, current sensing resistor, and oscilloscope, we show what actually happens when current flows through a filament bulb. You’ll see why the measured resistance is very low at first… and how it increases as the filament heats up. This is a key concept that many beginners miss — and understanding it will help you avoid mistakes when working with real circuits. 🔬 What you’ll learn: The difference between cold and hot resistance How filament temperature affects resistance Why current changes over time in a filament bulb ⚡ Tools used in this video: Bench power supply Multimeter Hantek DSO2C10 DIY current sensing resistor (2.2Ω parallel setup) 📊 Key concept: Resistance is not always constant. In filament bulbs, resistance increases with temperature — this is why your measurements may not match calculations at first. 🚀 If you found this helpful: Like 👍 Subscribe 🔔 And check out more electronics videos on this channel. electronics basics, ohms law explained, resistance vs temperature, filament bulb experiment, multimeter basics, beginner electronics mistakes, current measurement, oscilloscope tutorial