CAIE A-Level Physics AS 5.1.4 The Concept of Efficiency to Solve Problems Questions
Calculate efficiency as useful energy output divided by total energy input, expressed as a percentage.
- Syllabus
- 2028–2030
- Course
- Physics 9702
- Level
- AS
Exam points
- Calculate efficiency as useful energy output divided by total energy input, expressed as a percentage.
CAIE A-Level Physics AS 5.1.4 The Concept of Efficiency to Solve Problems Questions question 1
[Maximum number: 1]
In many filament lamps, as much as 92 J of energy is emitted as thermal energy for every 8 J of energy emitted as light.
What is the efficiency of a filament lamp, as the percentage of electrical energy converted to light energy?
A
8\%
B
9\%
C
91\%
D
92\%
A
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