What determines the current flow in a circuit?

The current flow in a circuit is determined by both resistance and voltage, as encapsulated in Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R). This relationship demonstrates that for a given voltage, an increase in resistance results in a decrease in current flow, while a decrease in resistance allows for an increase in current flow. Therefore, both factors interact to dictate how much current moves through the circuit.

Voltage provides the necessary push to drive the current, while resistance opposes that flow. This interplay clearly highlights why both resistance and voltage are critical in determining the overall current in a circuit. Understanding this concept is essential for anyone working with electronic systems, as it lays the foundation for analyzing and designing circuits effectively.