Asked in PMC Practice Test 1 (2021) 2021

The e/m values for the positive rays depends on _enclosed in a discharge tube.

Correct answer: A. Nature of gas

  • A. Nature of gas
  • B. Properties of gas
  • C. Composition of gas
  • D. All of these

Explanation

The e/m value of positive particles (anode rays) depends on the gas taken in the discharge tube. This content is given in the FSC book.

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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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