The electrostatic force acting per unit positive test charge at a location is a measure of the intensity of:

The correct answer is option 2) i.e. Electric field

CONCEPT: 

• Electric field: The region around an electric charge in which it can influence other charges is known as the electric field. 
  • The electric field intensity (E) at any point is defined as the force experienced by a unit charge placed at that location.

It is given by:

​\(E = \frac{F}{q}\)

EXPLANATION:

The electric field intensity at a point is given by:

 \(E = \frac{F}{q}\) .

• Therefore, the force acting per unit positive test charge at a location is a measure of the intensity of the electric field.

Additional Information

• Electric potential is the difference in potential energy per unit charge between two points in an electric field.
• Coulomb force is the force of interaction between electric charges separated by a distance.
• Gravity is the universal force of attraction acting between all matter.