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  • A two-times increase or decrease in power results in a ch...
Multiple choice general knowledge

A two-times increase or decrease in power results in a change of how many dB?

  1. 2 dB

  2. 3 dB

  3. 6 dB

  4. 12 dB

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A 3 dB change represents approximately double or half power because dB = 10log10(P2/P1). When power doubles (P2/P1=2), 10log10(2) ≈ 3.01 dB, commonly rounded to 3 dB.

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