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The electron-volt: eV

The electron-volt: eV. Situations: eV. An electon passing through a resistor across which there is a potential difference of 3V (3 eV of thermal energy transferred to the R) An electron passing though a generator that is generating an e.m.f of 24V.

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The electron-volt: eV

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  1. The electron-volt: eV

  2. Situations: eV An electon passing through a resistor across which there is a potential difference of 3V (3 eV of thermal energy transferred to the R) An electron passing though a generator that is generating an e.m.f of 24V. (24 eV of Ep transferred to the e-) An electron accelerates across a 9V electric field (9eV of Ek)

  3. How much energy? 1 Volt is 1 Joule per coulomb. An electron has a charge of 1.6 x 10-19 coulombs So 1eV is 1.6 x 10-19Joules In a coulomb of charge there are therefore: 1/ 1.6 x 10-19electrons = 6.25 x 10+18 electrons. So 1 Joule is 6.25 x 10+18eV

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