What is the SI unit of electromotive force? Md. Saifur Rahman What is the SI unit of electromotive force? SI unit of electromotive force is volt. 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?