Define modulation. Write any two types of modulation of carrier wave.

In a communication system, what is meant by modulation? State any two types of modulation.

Modulation for pulsed carrier wave can be

(a) What is amplitude modulation? Draw a diagram showing an amplitude modulated wave obtained by modulation of a carrier sinusoidal wave on a modulating signal. (b) Define the terms (i) modulation index, and (ii) side bands. Mention the significance of side bands.

The concepts of communication are (a) mode of communication (b) need for modulation (c ) types of modulation (d) detection of modulated wave

In an amplitude modulation with modulation index 0.5 the ratio of the carrier wave to that of side band in the modulated wave is

In an amplitude modulation with modulation index 0.5 the ratio of the carrier wave to that of side band in the modulated wave is