This study examines the effect of adding a mixed filler of Cerium Oxide (CeO₂) and Silicon Dioxide (SiO₂) nanoparticles on the dielectric characteristics of corn oil as an environmentally friendly alternative transformer insulating oil. The CeO₂–SiO₂ nanoparticle mixture was prepared in a 1:1 ratio with concentrations of 0,05; 0,1; 0,15; and 0,2 wt%. The experimental procedures includ…