engineering computer science MCQ #466

A signal is transmitted with a power of 100 mW. If it is attenuated by 20 dB, what is the received power?

engineering computer science MCQ #466

  1. Question 1

    Q1. A signal is transmitted with a power of 100 mW. If it is attenuated by 20 dB, what is the received power?

    • A) 1 mW
    • B) 10 mW
    • C) 0.1 mW
    • D) 5 mW

    Answer: 1 mW

    Explanation: Using the formula for dB, 20 dB = 10 log(P1/P2), so P2 = P1 / 10^(20/10) = 100 / 100 = 1 mW.