A signal of 0.1 kW is transmitted in a cable. The attenuation of cable is -5dB per km and cable length is 20km. The power received at receiver is 10-xW. The value of x is…………………
[Given in dB = 10 log10
A signal of 0.1 kW is transmitted in a cable. The attenuation of cable is -5dB per km and cable length is 20km. The power received at receiver is 10-xW. The value of x is…………………
[Given in dB = 10 log10
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1 Answer
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Sound level is given in dB = 10 log
As sound level decreases 5 dB every km,
So, in 20 km sound level will decrease by 20 × 5 = 100 dB.
x = 8
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