The charge to mass ratio of proton is lower than that of
Correct answer: A. Electron
- A. Electron
- B. Neutron
- C. Nucleus
- D. None
Explanation
The charge-to-mass ratio (e/m) is a measure of the charge of a particle relative to its mass. Electrons have a high charge-to-mass ratio because they have a very small mass and a significant charge. In contrast, protons, while also charged, have a much larger mass, resulting in a lower charge-to-mass ratio compared to electrons. Neutrons are electrically neutral, so their charge-to-mass ratio is zero, which is not meaningful for comparison with charged particles. The nucleus, being a composite structure of protons and neutrons, does not have a single charge-to-mass ratio, making it irrelevant in this context. Therefore, the correct answer is the electron.
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About Discovery of the Proton
The discovery of the proton follows the study of positive rays, also called canal rays, observed in discharge tubes and later identified as positively charged particles. The work of Goldstein and Rutherford is linked to the proton's charge, relative mass and role in the nuclear model, distinct from the discovery of the electron.
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