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atoms and emf

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atom
basic unit of matter, made of protons, neutrons, and electrons
who discovered electrons and when?
jj thomson, 1898
in what lab were electrons discovered
Cavendish Laboratory
what does emf stand for?
electromotive force
where are electrons?
cathode rays
how do electrons travel?
in straight lines
when was the crooke's tube invented?
around 1875
what is the crooke's tube used for?
it was where cathode rays were discovered
define emf
voltage produced by electric battery or generator, energy supplied by source of electric power
what causes emf?
excess of electrons at one point and deficiency of electrons at another. the difference at electric potential energy
what makes tvs bright?
phosphorus