What is charge on an electron ?
If an electron oscillates at a frequency of $ 1 GHz$ it gives
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
The current conduction in a discharged tube is due to
${O^{ + + }},\;{C^ + },\;H{e^{ + + }}$ and ${H^ + }$ ions are projected on the photographic plate with same velocity in a mass spectrograph. Which one will strike farthest
Write information about negative electric charge emitted from metals when $UV$ light is incident on them or metals are heated.