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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.

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Best answer

The power of the signal received is (b) 100 W.

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