Exam-style question
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What was a key observation in Millikan's oil-drop experiment that led to the determination of charge?.
- A.The droplets fell at a constant speed
- B.The droplets were attracted to the positive plate
- C.The droplets expanded when heated
- D.The droplets changed color in the electric field
Model answer
What a good answer should say
- The droplets were attracted to the positive plate
Explanation
Why this works
The observation that charged oil droplets were attracted to the positively charged plate in the electric field was crucial for determining the charge on the droplets, leading to the conclusion about the quantization of charge.
Common mistake
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