Post-UTME Physics 2005 Objective — Question 14
Question 14 of 23 from the Post-UTME Screening (Post-UTME) Physics 2005 Objective paper, with the correct answer and a full explanation.
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An electric lamp has the following markings 230V, 250W. How long would it take the lamp to use one kilo watt-hour when connected to a 230V mains?
- A. 8.0hr
- B. 6.0hr
- C. 4.0hrCorrect
- D. 2.0hr
Explanation
Time = Energy/Power = 1000Wh/250W = 4.0 hours.
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