The charge on one gram of electrons is:
Correct answer: D. 1.7588 x 10^8
- A. 1.7588 x 10^-11
- B. 1.7588 x 10^11
- C. 1.602 x 10^-19
- D. 1.7588 x 10^8
Explanation
We know 1 electron has a mass of 9.1x10²⁸g So 1g of electrons have how many number of electrons in it ? No of e= 1g x 1 /9.1x10²⁸g = 1.098x10²⁷ electrons Charge on an electron is 1.6x10-¹⁹ C So charge on 1.098x10²⁷ electrons (weighing one gram) is? 1.098x10²⁷ X 1.6x10-¹⁹ =1.756x10⁸C
This question appeared on the UHS MDCAT 2017 paper, which you can sit online with every answer explained.
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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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