Here's why:
* Inverse Square Law: The electric field strength is inversely proportional to the square of the distance from the charged particle. This means that if you double the distance, the field strength becomes four times weaker.
* Field Lines: Imagine electric field lines emanating from a positive charge. These lines represent the direction and strength of the electric field. As you move further away, the lines become more spread out, indicating a weaker field.
Example:
If you have a point charge of +1 Coulomb, the electric field strength at a distance of 1 meter is much stronger than the field strength at a distance of 2 meters.
In summary: The electric field strength of a charged particle weakens as you move further away from it, following an inverse square law.