When does current flow from a line charged with induced voltage?

Current flows from a line charged with induced voltage when the line is grounded at two points. This scenario creates a potential difference between the grounded points and the line, allowing current to flow through the grounding path. Grounding provides a complete circuit for the electrical potential, enabling the induced voltage to cause an electrical current.

In practical terms, grounding at two locations helps stabilize the system by providing a reference point for the potential while allowing current to find a path to the ground. This situation can be particularly relevant in systems where induced voltages could pose safety risks or when maintaining equipment.

In contrast, when the line is energized, it is carrying current due to the power supplied from the source, but that does not necessarily involve induced voltage in the same context. Touching the line might cause a potential shock depending on the voltage present, but it does not inherently facilitate a current flow due to induced voltage. Lastly, when the line is turned off, there is no current flow as the circuit is opened, preventing any induced voltage from causing a current to flow.