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An oil drop of radius 2 mm with a densit...

An oil drop of radius 2 mm with a density 3 g `cm^(-3)` is held stationary under a constant electric field `3.55 xx 10^5 V m^(-1)` in the Millikan's oil drop experiment. What is the number of excess electrons that the oil drop will possess ? Consider `g=9.81 m//s^2`

A

`1.73 xx 10^(12)`

B

`17.3 xx 10^(10)`

C

`1.73 xx 10^(10)`

D

`48.8 xx 10^(11)`

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