From the following, what charges can be present on oil drops in Millikan's experiment
(Here e is the electronic charge)
Zero, equal to the magnitude of charge on $\alpha - $ particle
$2e,\;1.6 \times {10^{ - 18}}C,$
$1.6 \times {10^{ - 19}}C,\;2.5e$
$1.5e,\;e$
Which one of the following devices makes use of the electrons to strike certain substances to produce fluorescence
Which of the following have highest specific charge
Which of the following law is used in the Millikan's method for the determination of charge
Order of q/m ratio of proton, $\alpha $ -particle and electron is
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