Conservation of Energy (AQA GCSE Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the fundamental principle of energy conservation?
What is the fundamental principle of energy conservation?
Energy cannot be created or destroyed
In a closed system, what is the net change in energy?
In a closed system, what is the net change in energy?
Zero
What is useful energy?
What is useful energy?
Energy transferred to the desired store
What term describes wasted energy?
What term describes wasted energy?
Dissipated
In a light bulb, which energy output is wasted?
In a light bulb, which energy output is wasted?
Heat
What do useful and wasted energy always add up to?
What do useful and wasted energy always add up to?
Energy input
What are the two key methods for minimising wasted energy?
What are the two key methods for minimising wasted energy?
Thermal insulation and lubrication
How does lubrication reduce energy loss?
How does lubrication reduce energy loss?
Makes surfaces smoother to reduce friction
Materials with low thermal conductivity make what type of insulators?
Materials with low thermal conductivity make what type of insulators?
Good thermal insulators
Why do buildings use materials with low thermal conductivity?
Why do buildings use materials with low thermal conductivity?
To insulate rooms inside