Experimental analysis of transformer efficiency in relation to load resistanceRatu Fenny Muldiani, Kunlestiowati Hadiningrum, Defrianto Pratama, Nani Yuningsih, I. Gede Rasagama, Sardjito Sardjito, Yunita Citra Dewi and Achda FitriahE3S Web of Conf., 479 (2024) 01007DOI: https://doi.org/10.1051/e3sconf/202447901007