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Homework Statement
A small plastic sphere is suspended between two parallel plates like so: http://gyazo.com/0b5425a78b645d85da0b3475d6d71734
How many excess or deficit electrons does the sphere have?
Homework Equations
##m=2.60x10^{-15}kg##
##V=265.4V ##
##d=0.500cm=0.000500m=5.0x10^{-4}m##
##g=9.81m/s^2##
##q = \frac{mgd}{V}##
##q = Ne##
##e = 1.6x10^{-19}C##
The Attempt at a Solution
The charge on the sphere is clearly positive because it is suspended in mid air and I calculated the magnitude of the charge to be ##q=4.8x10^{-20}C##.
This confused me slightly. Solving for the excess/deficit electrons ##N = 0.3##.
How can the sphere have a fraction of a deficit of electrons? I thought ##N## could only be an integer.