I have just started learning physics, and am very confused with Ohm's Law.
Ohm's Law states that the electrical current flowing in a metallic conductor is directly proportional to the potential energy applied across its ends, given that the physical conditions are kept constant.
It is my understanding that current refers to the number of charges flowing through a certain point of the circuit per second. Potential energy refers to the work done to drive one coulomb of electrons through an electronic component, or the amount of electrical energy converted to other forms of energy when one coulomb of electrons passes through an electronic component.
So my question is, how is it that when the resistance of a metallic conductor is kept constant, the greater the number of charges flowing through the component in one second, the greater the amount of energy required to drive one charge through that component?
Is there a reason behind it, or does it just happen like that?