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Electric field inside a metal is zero , when it is placed in an external electric field. What about human body? If it is placed in an external electric field, will the field inside the body be zero? I am confused because human body is a conductor but not as good as metals.

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No. Humans are not faraday cages. This is the reason such things as MRI scanners work.

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    $\begingroup$ or neural networks. $\endgroup$ – Sam Farjamirad Aug 30 '18 at 6:50
  • $\begingroup$ To be fair, the skin depth of humans is highly frequency-dependent. $\endgroup$ – Carl Witthoft Aug 30 '18 at 17:50

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