Exam-style question
Try this first
What happens to the pressure of a gas if its volume is halved while the temperature remains constant? Scenario focus: use circular motion in a distinct A-Level Physics context and identify the relevant physical quantity before choosing the answer.
- A.Pressure doubles
- B.Pressure halves
- C.Pressure remains the same
- D.Pressure decreases by a quarter
Model answer
What a good answer should say
- Pressure doubles
Explanation
Why this works
The correct answer is Pressure doubles. This option is correct for Thermal physics because it applies the circular motion idea in the stem and keeps the relevant quantity, unit, and physical conclusion together.
The alternatives either use a neighbouring formula, omit a required variable, or describe a different physical situation.
Common mistake
No common mistake is linked to this question yet.