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What is the mass of the droplet?
A droplet of oil carries an extra charge of one electron and is held motionless between parallel plates separated by 0.92 cm across which there is a potential difference of 58.0 kV. What is the mass of the droplet?
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- ?Lv 74 years agoFavorite Answer
The electric field E=58/0.92.
Say it is held at the height of h from the plate, then
mgh = e E h
m = e E/g=0.064*10^(-19)*10^4=0.064*10^(-15) kg= 6.4*10^(-17) kg
Check the result.
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