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Question 185

Which decibel value represents a power increase from 20 watts to 200 watts?

  1. 10 dBBonne réponse
  2. 12 dB
  3. 18 dB
  4. 28 dB

Explication

Going from 20 watts to 200 watts is a tenfold increase, and 10 × log₁₀(10) = 10 dB exactly. Each additional factor of ten adds another 10 dB.

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Question 185: Which decibel value represents a power increase from 20… · FCC Technician Class (Element 2) · Questena