J.J Thomson determined the:
Correct answer: C. e/m value of an electron
- A. Charge of an electron
- B. Mass of an electron
- C. e/m value of an electron
- D. Charge of a proton
- E. Mass of a proton
Explanation
Thomson was able to deflect the cathode ray towards a positively charged plate deduce that the particles in the beam were negatively charged. Then Thomson measured how much various strengths of magnetic fields bent the particles. Using this information Thomson determined the mass to charge ratio of an electron.All other options are incorrect because those were not discovered by J.J thomson.
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