Write the name of the universal and fundamental particle of matter.

$A$ metal plate gets heated when cathode rays strike against it due to:

$A$ beam of cathode rays is subjected to crossed electric $(E)$ and magnetic fields $(B).$ The fields are adjusted such that the beam is not deflected. The specific charge of the cathode rays is given by (where $V$ is the potential difference between cathode and anode):

Cathode rays are produced when the pressure is of the order of

When subjected to a transverse electric field,cathode rays move

An electron is: