Marine Engineering Practice Exam

The greater the body's resistance to electricity, the ______ amount of harm to the person.

Greater Lesser No harm Variable

Correct Answer:

Lesser

Explanation:

Electric shock harm depends on the current that flows through the body. For a given source voltage, current is inversely related to resistance (I = V/R). So when the body's resistance increases, the current that can pass through decreases, reducing the potential for injury. Higher resistance slows the current, lessening heating of tissues and the risk of dangerous effects like heart rhythm disturbances. Factors that change body resistance include skin condition and moisture (dry skin has higher resistance, wet skin lowers it), as well as the path and duration of contact. Thus, greater body resistance leads to a lesser amount of harm.

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