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Home  >>  JEEMAIN and NEET  >>  Physics  >>  Class12  >>  Communication Systems

In AM transmission power of carrier wave is 50KW what will be the transmission power if the modulation is 80%

$\begin{array}{1 1}(a)\;55KW\\(b)\;60KW\\(c)\;66KW\\(d)\;75KW\end{array}$

1 Answer

$P_t=P_c(1+\large\frac{m^2}{2})$
Where $P_t$-Power of transmission
$P_c$-Power of carrier wave
$m$-modulating factor=80%
$\Rightarrow 0.80$
$P_t=50(1+\large\frac{0.80^2}{2})$
$\;\;\;\;=66KW$
Hence (c) is the correct answer.
answered Mar 17, 2014 by sreemathi.v
 

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