How can the mass of an electron be obtained?

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(A) The mass of an electron $(m)$ can be determined by using the values of the charge of the electron $(e)$ and the specific charge $(e/m)$.$1$. The c

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By measuring the charge of the electron $(e)$ and the specific charge $(e/m)$.

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(A) The mass of an electron $(m)$ can be determined by using the values of the charge of the electron $(e)$ and the specific charge $(e/m)$.$1$. The charge of an electron $(e)$ is determined using Millikan's oil drop experiment,which gives $e \approx 1.602 	imes 10^{-19} \ C$.$2$. The specific charge $(e/m)$ is determined using $J$.$J$. Thomson's experiment (cathode ray tube experiment),which gives $e/m \approx 1.758 	imes 10^{11} \ C/kg$.$3$. By dividing the charge by the specific charge,we get the mass: $m = \frac{e}{(e/m)}$.$4$. Substituting the values: $m = \frac{1.602 	imes 10^{-19}}{1.758 	imes 10^{11}} \approx 9.11 	imes 10^{-31} \ kg$.

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