What is used to make the filament of an electric bulb? Md. Saifur Rahman What is used to make the filament of an electric bulb? Tungsten. You may like The conductivity of any conductor depends on which factors? What is a variable? What do you understand by 1 V potential difference? What is the voltage of the ground wire? What is a kilowatt-hour? What do you understand by 1 W of electricity? What is the series connection?