For current to flow through a person's body, what must be present?

For current to flow through a person's body, a difference of potential must be present. This concept stems from Ohm's Law, which states that current will flow when there is a voltage (or potential difference) applied across a circuit. In the case of a human body, if there is a voltage between two points, such as a person standing on the ground while touching a live wire, the current will seek a path to complete a circuit, which can include flowing through a person's body.

Having a difference of potential creates a driving force that encourages the flow of electric charge. It is essential to understand that without this potential difference, there would be no motivation for the electrons to move, and thus no current would flow.

In contrast, while factors like high voltage or resistance may influence the amount of current that flows, they do not themselves enable current to flow in the absence of a potential difference. Capacitance is a property related to a circuit's ability to store charge but is not directly involved in the flow of current through a person's body.