Q.State and briefly describe, with the help of a block diagram, the three basic elements common to every communication system.

A communication system, regardless of what it carries, is built from three essential blocks connected in a chain: a transmitter, a channel, and a receiver, with noise capable of entering and corrupting the signal at any point along the channel. The transmitter converts the message signal - first turned into electrical form by a transducer if it wasn't already electrical, as with sound - into a form suited to the channel. The channel, wired or wireless, carries the transmitted signal to the receiver, but may distort it or add noise along the way. The receiver then processes the received (possibly corrupted) signal to reconstruct a usable version of the original message for the end user. Communication happens either point-to-point (one transmitter, one receiver, e.g. a telephone call) or as a broadcast (one transmitter serving many receivers at once, e.g. radio or television).