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2024 · M/J · 5054/12 | Q16

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CIE-5054-2024-MJ-p12 · Question 16

You may use a calculator. Take the weight of 1.0 kg to be 9.8 N (acceleration of free fall = 9.8 m/s²).
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16 A 15W lamp is turned on for 30 minutes. It wastes 7000J of energy. What is the efficiency of the lamp? A 0.26 B 0.35 C 0.59 D 0.74

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5054/12/M/J/24Cambridge O Level Physics 5054 · May/June 2024 · Paper 1 variant 2 · Question 16