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Q.
What is $ \frac{e}{m} $ ratio of electron?
Delhi UMET/DPMTDelhi UMET/DPMT 2008Dual Nature of Radiation and Matter
Solution:
Thomson found that the value of $e / m$ of electron comes out to be
$1.76 \times 10^{11} Ckg ^{-1}$.
The accurate value of $e / m$ for electron is found to be
$1.7589 \times 10^{11} Ckg ^{-1}$