memo electric 2014 june grade 12
he current. Use Ohm’s Law: I = V/R = 12V / 3Ω = 4A. Sample Question 3 If a device consumes 60W power from a 120V supply, what is its resistance? Rearranged power formula: R = V² / P = (120V)² / 60W = 14400 / 60 = 240Ω. Tips for Exam