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[" A charged oil drop of mass "2.5times1...

[" A charged oil drop of mass "2.5times10^(-7)kg" is in space "],[" between the two plates,each of area "2times10^(-2)m^(2)" of a "],[" parallel plate capacitor.When the upper plate has a "],[" charge of "5times10^(-7)C" and the lower plate has an equal "],[" negative charge,then the oil remains stationary.The "],[" charge of the oil drop is (take,"g=10m/s^(2))],[[" (a) "9times10^(-1)C," (b) "9times10^(-6)C],[" (c) "8.85times10^(-13)C," (d) "1.8times10^(-14)C]]

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