1
Q
Definition of energy
A
The ratio of useful output work (energy) to total input work (energy)
2
Q
Equation for Efficiency
A
useful output energy ÷ total input energy
3
Q
Equation for useful power output
A
useful work done ÷ time taken
OR
Force x Speed
4
Q
Unit for Efficiency
A
Watts
5
Q
A
IGCSE Physics
flashcards
Decks in class (20)
# Cards
-
Topic 1.1 and 1.221
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Topic 1.3, 1.4, 1.517
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3.1-3.612
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3.1-3.6 ai13
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Energy15
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Work5
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Power4
-
Efficiency5
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Thermal Physics28
-
C3- Waves23
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P3.2-Light34
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P4.1 + 2- Magnetism and Electricity33
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P4.2.5- Electrical energy + Electrical power6
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P4.3- Electrical circuits11
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P4.4- Electrical safety11
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P3.3- Electromagnetic waves16
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3.4- Sound15
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P5.1- Nuclear physics12
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5.2- Radioactive11
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P6- Space physics21
