Question 53Electricity & Electronics - Assistant Engineer

The correct answer is B) 10 to 16 mA. The range of 10 to 16 milliamps of current through the body is the minimum threshold where most people would be unable to let go of an energized electrical conductor due to involuntary muscular contraction. This is based on the generally accepted physiological effects of electric current on the human body. Currents in this range can cause muscular paralysis, preventing the victim from being able to release the conductor. The other options are incorrect because 3-7 mA is considered the "let-go" threshold where most people can still voluntarily release the conductor, 30 mA is higher than the involuntary muscular contraction range, and 75 mA for 5 seconds is a much higher current that can lead to more severe injuries beyond just the inability to let go.