What is the relationship between potential difference and current?

The relationship between potential difference and current is described by Ohm's Law. Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points, and inversely proportional to the resistance between them. This can be mathematically expressed as:

I = V/R

Where: I is the current in amperes (A), V is the potential difference in volts (V), and R is the resistance in ohms (Ω).

So, if the potential difference increases, the current will also increase, provided the resistance remains constant. Similarly, if the resistance increases, the current will decrease for a given potential difference.