Question:
A 1 KW signal is transmitted using a communication channel which provides attenuation at the rate of – 2dB per km. If the communication channel has a total length of 5 km, the power of the signal received is [gain in dB = 10 log P0/P1]
(a) 900 W
(b) 100 W
(c) 990 W
(d) 1010 W
Solution:
(b) 100 W