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If the input signal power to a communication system is 1 W and the output power is 1 mW, the system attenuation is:
If the input signal power to a communication system is 1 W and the output power is 1 mW, the system attenuation is:
A . 3 dB
B . 20 dB
C . 30 dB
D . 40 dB
E . 1000 dB
Answer: C
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