Answer:
The value is
Explanation:
From the question we are told that
The magnitude of the first charge is 
The position is y = 8 cm = 0.08 m
The magnitude of the second charge is 
The position is x = 3 cm = 0.03 m
Generally the force exerted on the electron by the first charge is mathematically represented as

Here k is the coulombs constants with value
=> 
and e is the charge on a electron with value 
So


Generally the force exerted on the electron by the first charge is mathematically represented as

=>
=> 
Generally the net force exerted is mathematically represented as

So

The resultant of this net force is mathematically represented as



Generally this force can be represented as

Here m is the mass of the electron with value

=>
=>