The value of e/m for an electron is
Hi Vijay,
The value of charge on electron = 1.602176634 × 10 ^- 19 Coulomb.
The value of mass of electron = 9.109×10^-31 kilograms
The value of e/m for an electron = 1.758×10^11 C/kg .
Feel free to ask doubts in the Comment Section.
I hope this information helps you.
Good Luck!