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An electric lamp marked 240v, 60 W is left to operate for an hour. How...

Physics
JAMB 2009
An electric lamp marked 240v, 60 W is left to operate for an hour. How much energy is generated by the filament?
  • A. 3.86 x 105J
  • B. 3.56 x 105J
  • C. 1.80 x 104J
  • D. 2.16 x 105J
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Correct Answer: Option D
Explanation
Energy generated = power X time = 60w x 1h = 60 x 60 x 60 ws = 216000j = 2.16 x 105J

There is an explanation video available below.

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Explanation Video

WAEC offline past questions - with all answers and explanations in one app - Download for free
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WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709