Extra exam question E0A08
Subelement E0, SAFETY· Group E0A
E0A08
What does SAR measure?
- A.Signal attenuation ratio
- B.Signal amplification rating
- C.The rate at which RF energy is absorbed by the body (correct answer)
- D.The rate of RF energy reflected from stationary terrain
WhySAR measures the rate at which RF energy is absorbed by the body. SAR, Specific Absorption Rate, measures the rate at which RF energy is actually absorbed by body tissue, expressed in watts per kilogram, the underlying biological quantity that FCC MPE limits are ultimately built around, answer C. It isn't a signal attenuation or amplification rating, and it isn't a measure of RF energy reflected from terrain, those describe different, unrelated concepts.
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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