The ability to select a particular wanted signal only and rejected the unwanted signals is called ___________

The ability to amplify weak signals is called ___________

The process of extraction the audio signal from the modulated wave is called _________

The variation of frequency of carrier wave with respect to the amplitude of the modulating signal is called_____________

The satellite used only for reflecting the signals back to earth is called

Separation of a data signal from a carrier wave is called _____

The process of superimposing the audio signal over the carrier wave is called __________.

Demodulation is the reverse process of modulation, which is performed in a receiver to recover the original modulating signals. At the receiving end, the signals are generally weak due to attenuation in the channel. The receiver selects only the desired signal, rejecting the unwanted (noise) signals and amplifies the same. Read the above passage and answer the following questions: (i) What are the main functions of a demodulator? (ii) Give any two examples of demodulators. (iii) What does the phenomemom of demodulation imply in day to day life?

The process of superimposing any data signal on a carrier wave is called ____