does neutrino have electric charge?

Question

what is the mass and dimension of electron neutrino?
which method is used to detect a neutrion?

Answer 1

No, the neutrino has no electrical charge. The name "neutrino" was coined by Enrico Fermi and means "small neutral particle."
Neutrinos interact very weakly with matter. Initially, they were predicted theoretically (by Wolfgang Pauli) to account for energy, momentum and angular momentum which seemed to be missing in measurements of beta (electron-producing) decays of neutrons (the neutral particle in the atomic nucleus).

Electron neutrinos can be detected by the relatively rare inverse process called "reverse beta decay," wherein a neutrino plus a proton plus an electron turn back into a neutron. The weakness of the beta decay "force" as well as the three-body concurrence necessary for the reaction make it quite a rare one.

For a long time, neutrinos were thought to have a rest mass of exactly zero (and so travel at the speed of light)--as befits their bookkeeping function--but recent experiments have suggested that this may not be the fact after all. As far as anyone knows, all neutrinos are "point particles" like electrons.