Second law and engines (AQA A-Level Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
According to the second law of thermodynamics, what must a heat engine operate between?
According to the second law of thermodynamics, what must a heat engine operate between?
A source and a sink
Why is 100% efficiency impossible for a heat engine?
Why is 100% efficiency impossible for a heat engine?
Some energy must go to the sink
What is the efficiency formula for a heat engine in terms of and ?
What is the efficiency formula for a heat engine in terms of and ?
What is the maximum theoretical efficiency formula for an ideal heat engine?
What is the maximum theoretical efficiency formula for an ideal heat engine?
What units must be used for temperatures in the maximum efficiency formula?
What units must be used for temperatures in the maximum efficiency formula?
Kelvin
How can the efficiency of a heat engine be maximised?
How can the efficiency of a heat engine be maximised?
High and low
Which is NOT a reason real engines fail to achieve maximum theoretical efficiency?
Which is NOT a reason real engines fail to achieve maximum theoretical efficiency?
Distance from fuel source
What do Combined Heat and Power (CHP) schemes use?
What do Combined Heat and Power (CHP) schemes use?
Waste heat to heat buildings
What is the purpose of regenerative braking in vehicles?
What is the purpose of regenerative braking in vehicles?
Store braking energy for later use
Where can energy from regenerative braking be stored?
Where can energy from regenerative braking be stored?
In a flywheel