Current flow is directly affected by:

Current flow in an electrical circuit is primarily influenced by the applied voltage. According to Ohm's Law, the relationship between voltage (V), current (I), and resistance (R) in a circuit is expressed as I = V/R. This means that for a given resistance, the amount of current that flows through the circuit is directly proportional to the voltage applied. A higher voltage leads to a greater current flow, provided that the resistance remains constant.

Additionally, while resistance, circuit design, and the type of current can affect how the current behaves in specific scenarios, they do not directly dictate the flow in the same fundamental manner that voltage does. Thus, understanding the role of applied voltage is critical when analyzing current flow in any electrical system.