A \( 1 \mathrm{KW} \) signal is transmitted using a communication c...

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A \( 1 \mathrm{KW} \) signal is transmitted using a communication channel which provides attenuation at the rate of \( -2 \mathrm{~dB} \) per \( \mathrm{km} \). If the
\( \mathrm{P} \) communication channel has a total length of \( 5 \mathrm{~km} \), the power of

W
the signal received is [gain in \( \mathrm{dB}=10 \log \left(\frac{P_{0}}{P_{t}}\right) \) ]
(a) \( 900 \mathrm{~W} \).
(b) \( 100 \mathrm{~W} \).
(c) \( 990 \mathrm{~W} \).
(d) \( 1010 \mathrm{~W} \).
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