Question 55Electricity & Electronics - Assistant Engineer

70% to pass

With all other factors considered equal (such as voltage, conducting path through the body and the duration of contact), contact with an energized electrical system conductor of which system type would produce the most damaging effect?

ADC systems

B60 Hz AC systems

C10 kHz AC systems

DAll the above systems would be equally as damaging

AI Explanation

The correct answer is B) 60 Hz AC systems. The reason is that 60 Hz AC systems are the most dangerous for the human body compared to DC systems or higher frequency AC systems. This is due to the physiological effects of the alternating current on the human body. The 60 Hz frequency is close to the natural rhythm of the human heart, which can cause the muscles to contract uncontrollably, leading to cardiac arrest and other life-threatening injuries. In contrast, DC systems and higher frequency AC systems (such as 10 kHz) are generally less harmful as they do not interfere with the body's natural electrical signals in the same way. Therefore, while all energized electrical conductors can be dangerous, contact with a 60 Hz AC system would produce the most damaging effect, all other factors being equal.

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