A-LevelPhysicsWork, energy and powerMay/June 2022Paper 1 Q171 Mark
Researchers have developed a new type of filament lamp with an efficiency of 40%. Old-type filament lamps have an efficiency of 5.0%. The two types of lamp produce the same useful output power. What is the ratio input power to new type of lamp / input power to old type of lamp?
A0.13
B0.63
C1.6
D8.0
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The correct answer is A. This question tests the candidate's understanding of work, energy and power within the Physicssyllabus. The examiner's mark scheme requires...
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