* Resistivity is a material property: Resistivity (ρ) is an intrinsic property of a material, meaning it's a characteristic of the material itself and doesn't change with the amount of charge present. It's determined by factors like:

* Atomic structure: How tightly the atoms hold onto their electrons.

* Temperature: Higher temperatures increase atomic vibrations, making it harder for electrons to flow.

* Impurities: Impurities disrupt the regular atomic structure, increasing resistance.

* Charge is a result of current: Charge is the amount of electrical energy stored in a material. It's the flow of charge (current) that experiences resistance, not the charge itself.

Think of it this way:

* Resistivity is like the width of a pipe: A narrow pipe will resist the flow of water more than a wide pipe.

* Charge is like the amount of water: Whether you have a gallon of water or a bucket of water, the pipe's width (resistivity) determines how easily the water flows through it.

Important Note: While the amount of charge doesn't affect the resistivity of a conductor, the *density* of charge carriers (electrons in a conductor) can affect the *conductivity* (the inverse of resistivity). But even in this case, it's not the charge itself, but the number of charge carriers that matter.