Answer:
The magnitude of the electrostatic force acting in the electron is
.
Step-by-step explanation:
The relation between electric field, electric force and charge is given as

Here E is electric field, F is the electric force and e is the electric charge on electron.
Given
.
Substitute the given values, we get

The magnitude of force,
.
Thus, the magnitude of the electrostatic force acting in the electron is
.