The process of the loss of strength of a signal while propagating through a medium is

If a radio receiver amplifies all frequency signals equally and well,it is said to have high . . . . . . .

$A$ carrier wave of peak voltage $15 \,V$ is used to transmit a message signal. If the modulation index is $60 \%$, then the peak voltage of the modulating signal is (in $\,V$)

The maximum amplitude of an $AM$ wave is $90 V$ and the minimum amplitude is $10 V$. What is the original amplitude of the carrier wave in the given $AM$ wave in $V$?

What should be the height of a transmission antenna (in $m$) to cover a range of $128 \, km$?

Consider telecommunication using optical fibers. Which of the following statements is $NOT$ true?