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TASPhysicsQuick questions
Unit 3: Gravity and Electromagnetism
Quick questions on Millikan's oil drop experiment - TCE Physics (Tasmania)
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What is the apparatus?Show answer
Millikan's apparatus had two horizontal parallel plates with a known separation, connected to a variable voltage. A fine mist of oil was sprayed above the top plate; the drops picked up charge through friction in the sprayer and from ionising radiation. A drop drifted through a small hole into the uniform field between the plates, where it could be watched through a microscope.
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