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