What Is The Resistance Of A Light Bulb?
What Is The Resistance Of A Light Bulb? The typical cold resistance of a 100 W incandescent lamp is about 9.5 ohms. If that resistance stayed the same with 120 V applied, Ohm’s Law tells us that the bulb would draw about 12.5 amps and dissipate about 1,500 watts. Do light bulbs have resistance? The