Calculate the resistance of the filament of a lamp rates 240V; 40W? by Sunday | Sep 1 | Physics WAEC | 0 comments A. 240Ω B. 360Ω C. 720Ω D. 1440Ω E. 2880Ω Correct Answer: Option D – 1440Ω Explanation R = V²/P = 240²/40 = 1440Ω