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Question
The net mass energy of an electron is
Options
510 kev
931 kev
510 mev
931 mev
MCQ
Solution
510 kev
Explanation:
Electron's net mass energy
E = M0C2 = `9 xx 10^-31 (3 xx 108)^2` joule
= `(9 xx 9 xx 10^-15)/(1.6 xx 10^-16)`
= kev
= 510 kev.
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