Question 47Electricity & Electronics - QMED

The correct answer is D) 75 mA for 5 seconds. The minimum threshold of electric current through the body that can cause ventricular fibrillation, a condition where the heart's ventricles contract in an uncoordinated manner and can only be resuscitated with a defibrillator, is generally considered to be around 75 mA for a duration of 5 seconds. This threshold is based on the physiological response of the human body to electric current and is a widely accepted standard in electrical safety regulations. The other options are incorrect because: A) 3-7 mA is generally considered the threshold for the onset of muscular contraction, which is much lower than the level required for ventricular fibrillation. B) 10-16 mA is the range where the current can cause a person to be unable to let go of the electrical source, but not necessarily cause ventricular fibrillation. C) 30 mA is the level where the current can cause severe burns and tissue damage, but may not necessarily lead to ventricular fibrillation.