The bandwidth of an audio signal is approximately:

$A$ message signal of frequency $15 kHz$ is used to modulate a carrier of frequency $v_c$. If the side bands produced are $1515 kHz$ and $1485 kHz$,then $v_c$ is (in $MHz$)

The maximum number of $TV$ signals that can be transmitted along a coaxial cable is

The mathematical form of an $AM$ wave is given by $e = 50 (1 + 0.5 \sin (2\pi \times 5 \times 10^{3}) t) \sin (31.4 \times 10^{6}) t \, V$. To generate this $AM$ wave,the amplitudes of the carrier wave and the modulating wave must be,respectively,....... and ....... .

Which of the following is not a basic component of a communication system?

If the height of the transmitting tower is increased by $30 \%$,then the area covered by it increases by (in $\%$)