How long should current flow in a longer shock, according to research?

The recommended duration of current flow in the case of a longer shock is typically established based on research into the physiological effects of electric current on the human body. It is understood that as the duration of exposure to electric current increases, so does the risk of severe injury or fatality, particularly due to muscle contractions and potential cardiac interference.

Current flow lasting for about 3 seconds is a critical threshold identified in safety guidelines and research studies. This duration reflects a balance that's deemed safer for individuals who may experience accidental electric shock. Prolonged exposure beyond this time can significantly elevate the risk of harm, such as cardiac arrest or serious injuries resulting from involuntary muscle contractions.

In contrast to the other choices, durations of 1 second, 5 seconds, and 10 seconds represent either insufficient or excessive exposure levels that could lead to increased health risks. The focus on 3 seconds as a time frame is underscored by data indicating that this is often a pivotal moment where immediate medical intervention may be needed to prevent irreversible harm or fatal outcomes.