Exam-style question
Try this first
Which method would be safest for answering an exam question on Describe Observations From Cathode Ray Experiments?.
- A.A. State the principle, apply the correct relationship or reasoning step, include units or direction where needed, and finish with the meaning for Cathode rays.
- B.B. Start with the final answer and only add working if there is time.
- C.C. Use any formula from The discovery of the electron because the same equation always applies.
- D.D. Avoid explaining the method because A-Level Physics questions only reward final answers.
Model answer
What a good answer should say
- Field Direction answer 855c07: A.
- State the principle, apply the correct relationship or reasoning step, include units or direction where needed, and finish with the meaning for Cathode rays.
- is correct because it matches Describe observations from cathode ray experiments.
- through Michelson-Morley, special relativity, time dilation, de Broglie wavelength.
Explanation
Why this works
Stem being answered: Which method would be safest for answering an exam question on Describe Observations From Cathode Ray Experiments? Route focus: turning-points-in-physics / The Discovery Of The Electron.
Key vocabulary for this item: observations, cathode, ray, experiments. Option check: keep Field Direction answer 855c07: A because it matches the stem; reject alternatives that change observations, cathode, ray or use a neighbouring model.
The explanation should keep the answer tied to these exact words rather than a general physics summary, using units, graph evidence or equation reasoning only when they are relevant to the stem.
Common mistake
No common mistake is linked to this question yet.