Cathode rays are similar to visible light rays in that
They both can be deflected by electric and magnetic fields
They both have a definite magnitude of wavelength
They both can ionise a gas through which they pass
They both can expose a photographic plate
In Thomson experiment of finding $e/m$ for electrons, beam of electron is replaced by that of muons (particle with same charge as of electrons but mass $208$ times that of electrons). No deflection condition in this case satisfied if
An electron beam is moving between two parallel plates having electric field $1.125 \times {10^{ - 6}}N/m$. A magnetic field $3 \times {10^{ - 10}}T$ is also applied so that beam of electrons do not deflect. The velocity of the electron is ............ $m/s$
Explain emission of electron from metal. Define work function. Write its unit, work function of metal depend on which factors ?
In a Millikan's oil drop experiment the charge on an oil drop is calculated to be $6.35 \times {10^{ - 19}}C$. The number of excess electrons on the drop is
The cathode rays have particle nature because of the fact that