Conservation of Energy (OCR GCSE Physics A (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 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?
Always zero
What is useful energy?
What is useful energy?
Energy transferred to the desired store
What term describes energy that ends up in unintended stores?
What term describes energy that ends up in unintended stores?
Wasted energy
In a light bulb, which energy is wasted?
In a light bulb, which energy is wasted?
Heat energy
What do useful and wasted energy always add up to?
What do useful and wasted energy always add up to?
The 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
What is the purpose of thermal insulation?
What is the purpose of thermal insulation?
To slow down the rate of heat loss
What does lubrication reduce?
What does lubrication reduce?
Energy lost to friction
What property tells you how well a material transfers heat?
What property tells you how well a material transfers heat?
Thermal conductivity
What type of materials make good thermal insulators?
What type of materials make good thermal insulators?
Low thermal conductivity materials
Why are buildings constructed with low thermal conductivity materials?
Why are buildings constructed with low thermal conductivity materials?
To insulate rooms inside