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