Question

How do you find the direction of the electric field and force? and what is the relationship between the direction of each?

Answer 1

Electric field is defined as the electric force per unit charge.

Electric Force between two point charges of magnitude Q and q separated by distance r, is

while the electric field exerted by point charge of magnitude Q on test charge q at a distance r from it is

The direction of the electric field is taken to be same as the direction of the electric force it would exert on a positive test charge at a certain distance r.

direction of Electric field lines due to positive and negative point charges act as follows:

The electric field is radially outward from a positive charge and radially in toward a negative point charge.

Hope this helps. Please provide an UPVOTE.