Technician exam question T0C03
Subelement T0, SAFETY· Group T0C
How does the allowable power density for RF safety change if duty cycle changes from 100 percent to 50 percent?
- A.It increases by a factor of 3
- B.It decreases by 50 percent
- C.It increases by a factor of 2 (correct answer)
- D.There is no adjustment allowed for lower duty cycle
WhyIf duty cycle changes from 100 percent to 50 percent, the allowable power density for RF safety increases by a factor of 2. Cutting duty cycle from 100 percent to 50 percent means a transmitter is only actually radiating half the time, so its average exposure over any given period is halved for the same peak power, letting the allowable power density for that peak level increase by a factor of 2, answer C. A, B, and D don't match the direct halving-of-average-exposure relationship that duty cycle produces.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.
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