A beam of electrons has an energy of 1 joule.How many electrons are in the beam?
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Answers
Answered by
19
one electron has a charge of 1.6×10⁻¹⁹ joules.As u r telling one joule it has energy of 1 joule it has 1÷(1.6×10⁻¹⁹) electrons.
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Answered by
19
1 eV=1.6 x 10 ^-19 J
1 J=1/1.6x 10^-19 eV
1 electron =1 eV
no of electrons =6.25x10^18
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