Solved UPSC CDS/OTA Question
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Q · Structure of the AtomMedium · 45s
Which subatomic particle was discovered by J.J. Thomson?
TopicStructure of the Atom
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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In 1897, J.J. Thomson discovered the electron using cathode ray tube experiments.
Final Answer: Option C — Electron