Today we'll be conducting an experiment on Ohm's law.
Literal
Today [topic-は] Ohm [possessive-の] law [regarding-に関する] experiment [object-を] conduct.
オームの法則 'Ohm's law' — basic physics. に関する 'regarding, related to' is a formal compound particle modifying 実験. 行います is the polite form of 行う, a formal synonym of する. A teacher's announcement at the start of class.