An electric lamp rated 120W is used on a 240Vrms, calculate the resistance of its filament
A
480\(\Omega\)
B
360\(\Omega\)
C
60\(\Omega\)
D
2\(\Omega\)
Verified Correct Answer: A.
Physical Principles & Numerical Solution
R = \(\frac{V^2}{P} = \frac{240^2}{120} = 480\Omega\)
Source: Myschool Past Questions Archive (Record #34697)