Exam-style question
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What evidence did Millikan's oil-drop experiment provide for the quantisation of charge?.
Model answer
What a good answer should say
- Millikan's oil-drop experiment showed that the charge on oil droplets was always a multiple of a fundamental charge value, indicating that charge is quantised.
- This means that charge exists in discrete amounts rather than any arbitrary value.
Explanation
Why this works
This answer is strong because it directly addresses the evidence from Millikan's experiment, highlighting the observation of charge multiples. It tests the understanding of quantisation in the context of experimental physics.
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