Solution:
The specific charge of a species is determined by the charge to mass ratio of the species, and the mass of a species is a function of its velocity. Consequently, it is possible to calculate the variance in an electron's particular charge by first establishing a link between specific charge and mass, and then between mass and electron speed.Concept- Specific charge – charge/mass
Mass of
- relativistic mass of equationMass of
= 
Charge on =
Einsteins R.M.E = 
The specific charger drops as electron speed increases since charge doesn't change with velocity.Another factor that contributes to a particular charge is the charge to mass ratio. The electron's De Broglie wavelength decreases with increasing electron speed.
Hence, option 2 is correct.
