Dual Nature of Radiation and Matter

Question: In Millikan’s oil drop experiment, an oil drop of mass $16 \times {10^{ - 6}}kg$ is balanced by an electric field of ${10^6}V/m.$ The charge in coulomb on the drop, assuming $g = 10\,m/{s^2}$ is



1) $6.2 \times {10^{ - 11}}$
2) $16 \times {10^{ - 9}}$
3) $16 \times {10^{ - 11}}$
4) $16 \times {10^{ - 13}}$
Solution: Explanation: No Explanation
Cathode Rays and Positive Rays

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