A tungsten-filament lamp has a temperature of 2050°C and a

Last updated: 7/10/2022

A tungsten-filament lamp has a temperature of 2050°C and a resistance of 500 ohms when taking normal working current. Calculate the resistance of the filament when it has a temperature of 25°C. Temperature coefficient of resistance of tungsten at 0°C = 0.005/°C.