Extra exam question E0A03
Subelement E0, SAFETY· Group E0A
Over what range of frequencies are the FCC human body RF exposure limits most restrictive?
- A.300 kHz - 3 MHz
- B.3 - 30 MHz
- C.30 - 300 MHz (correct answer)
- D.300 - 3000 MHz
WhyFCC human body RF exposure limits are most restrictive over the 30-300 MHz frequency range. FCC human body RF exposure limits are most restrictive over the 30-300 MHz range, since the human body absorbs RF energy most efficiently (resonantly) at these frequencies, given typical body dimensions, answer C. Lower frequencies (300 kHz-3 MHz and 3-30 MHz) and higher frequencies (300-3000 MHz) don't couple into the body as efficiently, so their limits are comparatively less restrictive.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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