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When measuring signal strength, dBm is commonly used and 0 dBm corresponds to 1 mW power. What does -20 dBm correspond to?
Correct Answer: B
dBm is a unit of power that measures the ratio of a given power level to 1 mW. The formula to convert dBm to mW is: P(mW) = 1mW * 10^(P(dBm)/10). Therefore, -20 dBm corresponds to 0.01 mW, as follows: P(mW) = 1mW * 10^(-20/10) = 0.01 mW References: https://www.rapidtables.com/convert/power/dBm_to_mW.html