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Calculate the resistance of the filament of a lamp rates 240 V, 40 W
Classroom
Physics Classroom
Waec
Waec 1990
More Topics
Calculate the resistance of the filament of a lamp rates 240 V, 40 W
SchoolNGR Classroom
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
A
240Ω
B
360Ω
C
720Ω
D
1440Ω
E
2880Ω
Show Answer
Show Explanation
Correct Answer:
Option D
Explanation:
R = V
2
/P = 240
2
/40 = 1440Ω
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