Exam-style question
Try this first
For Discovery of photoelectricity, which option best applies turning-point evidence to Describe key photoelectric effect observations.?.
- A.Use the stopping potential graph: maximum kinetic energy is inferred from potential difference, so the answer tests photoelectron energy.
- B.Use a classical formula label without connecting it to the experimental evidence.
- C.Describe the apparatus only and omit the physical conclusion drawn from the result.
- D.Treat the effect as ordinary circuit behaviour rather than a turning-point physics idea.
Model answer
What a good answer should say
- The correct option is Use the stopping potential graph: maximum kinetic energy is inferred from potential difference, so the answer tests photoelectron energy.
Explanation
Why this works
It is correct because it links the named experiment or model change to the physical evidence and conclusion. The other options are incorrect because they quote a formula without interpretation, describe apparatus without the conclusion, or reduce the turning-point idea to ordinary circuit or force behaviour.
Common mistake
No common mistake is linked to this question yet.