GCSE Physics – Calculating efficiency
Learning Objectives
-I can calculate efficiency
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Question 1 of 12
1. Question
What is the maximum possible efficiency?
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Question 2 of 12
2. Question
What is the equation for efficiency?
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Question 3 of 12
3. Question
How else can efficiency be defined?
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Question 4 of 12
4. Question
Rearrange to find useful power out.
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Question 5 of 12
5. Question
What are the units for efficiency?
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Question 6 of 12
6. Question
What are the units for power?
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Question 7 of 12
7. Question
Useful energy out is 400 J and total energy in is 8000 J. What is the efficiency?
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Question 8 of 12
8. Question
Useful energy out is 56 J and total energy in is 160 J. What is the efficiency?
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Question 9 of 12
9. Question
Useful energy out is 1.2 x 10^6 J and total energy in is 4.8 x 10^7 J. What is the efficiency?
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Question 10 of 12
10. Question
If power in is 50 W and efficiency is 20%, what is useful power out?
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Question 11 of 12
11. Question
If power in is 100 W and efficiency is 40%, what is useful power out?
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Question 12 of 12
12. Question
If power in is 120 W and efficiency is 34%, what is useful power out?
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