alleryStart learning →What happens to electrical current in a person at very high frequency?
AIt travels straight through the heart
BIt travels only on the body surface
CIt stops the heart far more easily
DIt is felt much more strongly than DC
Answer & Solution
Correct answer: B. It travels only on the body surface
1. As frequency climbs, the body becomes progressively less sensitive to effects that involve nerves.
2. At very high frequency the current also stops penetrating and runs only on the surface.
3. Because it never reaches the heart, a wart can be burned off without the heart stopping.
4. High-voltage arc demonstrations passed over people's bodies rely on high frequency and low current for the same reason.
5. None of this holds at 60 hertz, where the current does pass through the trunk.
_Source: OpenStax College Physics (CC BY 4.0), Ch 20 "Electric Current, Resistance, and Ohm's Law", section Shock Hazards_
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