Essential elements of a communication system are

Options

A. transmitter and receiver
B. reciever and communication channel
C. transmitter and communication channel
D. transmitter, comunication channel and receiver

Explanation

### Step-by-Step Solution:

1. **Identify the Information Source**:
- The first essential element of a communication system is the information source. This is where the message or information originates. It could be a person speaking, a camera capturing images, or any other source of data.

**Hint**: Think of the information source as the starting point of communication, where the message is generated.

2. **Input Transducer**:
- The second element is the input transducer. This device converts the information from the source into a suitable form for transmission. For example, a microphone converts sound waves into electrical signals, while a camera converts light into electrical signals.

**Hint**: Remember that the input transducer acts as a bridge between the information source and the transmitter.

3. **Transmitter**:
- The third element is the transmitter. The transmitter takes the electrical signals from the input transducer and modulates them into a form suitable for the transmission medium. This could involve amplifying the signal or converting it into radio waves.

**Hint**: The transmitter is crucial for preparing the signal for travel through the communication channel.

4. **Channel**:
- The fourth element is the channel. This is the medium through which the transmitted signal travels. It can be a physical medium like wires or optical fibers, or it can be wireless, like radio waves in the air.

**Hint**: Consider the channel as the path that the signal takes to reach its destination.

5. **Receiver**:
- The fifth element is the receiver. The receiver captures the transmitted signals from the channel and converts them back into a form that can be understood by the user. This could involve demodulating the signals and converting them back into sound or images.

**Hint**: The receiver is essential for interpreting the received signals and making them usable.

6. **Output Transducer**:
- The final element is the output transducer. This device converts the electrical signals back into a form that can be perceived by humans, such as sound from speakers or images on a screen.

**Hint**: Think of the output transducer as the final step in the communication process, where the message is delivered to the audience.

### Summary of Essential Elements of a Communication System:
- Information Source
- Input Transducer
- Transmitter
- Channel
- Receiver
- Output Transducer