What is considered the killer of electrical shock?

The concept of the "killer" of electrical shock primarily relates to the role of current in causing harm or fatal injuries. When an electric current passes through the human body, it has the potential to disrupt the normal electrical signals that control various bodily functions, particularly those related to the heart. The severity of electrical shock is often determined by the amount of current that flows through the body, which is measured in amperes (amps).

Current can cause a variety of adverse effects depending on its magnitude. For instance, currents as low as 0.1 to 0.2 amps can be lethal, as they can result in ventricular fibrillation—a condition where the heart's rhythm becomes erratic, leading to a failure to pump blood effectively. The threshold for feeling a shock is typically around 1 milliamp, but as the current increases, so do the potential for serious injury and fatality.

While voltage is necessary to push current through a circuit, it is the current that ultimately leads to physiological effects. Resistance does play a role in determining how much current flows for a given voltage, following Ohm's law, but it is the current itself that poses the most direct threat when it comes to electrical shock. Frequency, while important in the context of alternating