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Question 183

Which decibel value most closely represents a power increase from 5 watts to 10 watts?

  1. 2 dB
  2. 3 dBCorrect answer
  3. 5 dB
  4. 10 dB

Explanation

Going from 5 watts to 10 watts doubles the power, and 10 × log₁₀(2) = 3.01 dB, which rounds to 3 dB. Doubling power is the standard 3 dB step and is worth memorizing.

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Question 183: Which decibel value most closely represents a power… · FCC Technician Class (Element 2) · Questena