Charge Calculation: Mass/Charge Ratio Explained

[spidey]

How charge is calculated? for example,how we found the charge of an electron or proton?
is it using mass/charge ratio in mass spectrometer?

 

[jtbell]

charge of an electron

Originally, Millikan's oil drop experiment. I don't know how the most accurate current value was found.

 

[Tac-Tics]

Like this:
http://en.wikipedia.org/wiki/Oil-drop_experiment

edit: ninja'd

 

[spidey]

Thanks for the info..

 

[gfshwsr]

How charge is calculated? for example,how we found the charge of an electron or proton?
is it using mass/charge ratio in mass spectrometer?

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