Which of the following was the instrument used for the discovery of the electron?
A
Plum Pudding Model
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B
Oil Drop Apparatus
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C
Gold Foil Experiment
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D
Alpha Particle Emitter
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E
Cathode Ray Tube
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Solution
The correct option is B Cathode Ray Tube Cathode Ray Tube was the instrument used for the discovery of the electron. J.J. Thomson discovered electron during the study of cathode rays (stream of electrons).