* Electric Field Strength: The electric field strength at a point is the force experienced by a unit positive charge placed at that point.

* Inverse Square Law: The strength of the electric field produced by a point charge is inversely proportional to the square of the distance from the charge.

In simpler terms:

As you get closer to a charged particle, the electric field lines become more concentrated, meaning the force they exert on a test charge is stronger. This is because the same amount of electric flux is spread over a smaller area.

Example:

Imagine you're standing near a campfire. The heat you feel (analogous to the electric field strength) is much stronger when you're close to the fire than when you're farther away.