Assume a signal travels through a transmission medium and its power is reduced…
2026
Assume a signal travels through a transmission medium and its power is reduced to one-half, which means P2 = 1/2 P1. What is the power loss in attenuation?
- A.
-6 db
- B.
-3 db
- C.
-1.5 db
- D.
-1 db
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Correct answer: B
The power loss in decibels is calculated using the formula 10 * log10(P2/P1). Given P2 = 1/2 P1, the ratio is 0.5. The logarithm of 0.5 is approximately -0.3010, and multiplying by 10 gives -3.01 dB, which rounds to -3 dB.