An oil drop of radius \( 2 \mathrm{~mm} \) with a density \( 3 \mathrm{~g} \mathrm{~cm}^{-3} \) is held stationary under…

An oil drop of radius \( 2 \mathrm{~mm} \) with a density \( 3 \mathrm{~g} \mathrm{~cm}^{-3} \) is held stationary under a constant electric field \( 3.55 \) \( \times 10^{5} \mathrm{Vm}^{-1} \) in the Millikans oil drop experiment. What is the number of excess electrons that the oil drop will possess?

(consider \( g=9.81 \mathrm{~m} / \mathrm{s}^{2} \) )

[JEE Main 2021, 18 Mar (Shift 1)]