The definition of an electric field is based upon what law?

ohms law
newtons law
coulomb’s law

Coulomb's law.

Explanation: Newton's laws are about dynamics, so we can discard them, now let's analyze the other two:

Ohm's law says that the current through a conductor between two points is directly proportional to the voltage across the two points. This law is particularly used for circuits but works in other situations.

Coulomb's law quantifies the amount of force between two stationary, electrically charged particles. Where this force is:

F = k*q1*q2/r^2

where k is a constant, q1 and q2 are the charges of the particles and r  is the distance between the particles.

The concept of the electric field (and a lot of the physics behind it) comes from this law, where defines the fundamental force in electromagnetism.

So the correct option is coulomb's law.