What effect does resistance have on current flow in a conductor?

Resistance plays a crucial role in the flow of electric current within a conductor, particularly as described by Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R), or I = V/R. As resistance increases, for a given voltage, the amount of current that can flow through the conductor decreases. This is because resistance opposes the flow of electric charge.

In practice, when you consider a conductor with high resistance, it significantly impedes the movement of electrons, leading to a lower current flow. This situation can be observed in various electrical components, such as resistors, where controlling current is essential to ensure circuit protection and functionality. Thus, the correct understanding is that an increase in resistance directly correlates with a decrease in current flow, confirming that resistance indeed reduces the flow of current within a conductor.