Question

Draw block diagram of
A. Communication system
B. Production of AM waves
C. Transmitter
D. Receiver

Answer 1

Hint : A communication system consists of mainly five blocks that include information source, transmitter, channel, receiver and destination. The information for a source is first passed into the information source where it is converted into a message signal. Then it passes into a transmitter where the message signal is amplified and passed to the receiver via channel. The receiver receives the message signal and converts it into its original form.

Complete Step By Step Answer:
The figure below shows the block diagram of a basic communication system.

A communication system consists mainly of five blocks that include information source, transmitter, channel, receiver and destination.
In a communication system, the first thing that we need is information generated from a source, which we want to transfer from one end to another. The information source converts the original information into a physical quantity that can be transferred. This physical quantity is called a message signal.
Then the message signal passes into the transmitter. A transmitter collects the message signal and may modify it into a suitable form if needed and then transmits to the receiver via the chosen channel. Channel is a physical medium that connects the transmitter and the receiver. For example cables and wires.
Then the message signal is received by the receiver, which converts the message signal into its original non-electric form. Then this information is passed to the destination where the data is interpreted.
Block diagram of a transmitter and AM waves:

Block diagram of a receiver:

Note :
Sometimes, the input source information can be transferred in its original form. Therefore, the transmitter modifies the message signal by amplifying it. This step is called amplitude modulation.
When the message signal passes through the channel, many unwanted signals (termed as noise) superimpose with the message signal. This is corrected by the receiver.