# Electromagnetic Waves: Coils, Transmitters & Energy

• Akmalidin
In summary, the conversation discusses the functioning of a transmitter and receiver for electromagnetic waves. It is mentioned that the transmitter emits multiple electromagnetic waves in a spherical pattern, with the energy carried by each wave varying depending on factors such as modulation and distance. The frequency of the transmitter is 6 Mhz and it uses amplitude modulation. The energy radiated by the waves falls with distance and the power is divided among the waves. The conversation also clarifies that the term "omit" should be "emitted" when referring to the waves.
Akmalidin
I have coils to transmit and receive the power supplied.When we supply the transmitter , it omit the electromagnetic wave.Does it omit one electromagnetic wave or a lot of them? If there are several of them, is the energy supplied ,divided equally to the number of waves or every wave carries the same amount of power?

"A lot of electromagnetic waves" would be like "a lot of water". You cannot count it in a meaningful way.

Is the power divided or every wave possesses the same power?

Transmitter is in about 6 Mhz. it is amplitude modulation.

The energy radiated will be in a band with twice the frequency of the modulation, centred on the carrier frequency.
The EM waves will radiate as spherical waves so the energy will fall with distance, proportional to 1/d2.

Your statement “every wave possesses the same power” does not immediately make sense. Power is the rate of energy flow. Energy is carried in the wave. The amplitude of the wave varies with carrier power, modulation and distance propagated. Modulation changes the amplitude with time. What do you mean by “every wave”?

davenn
Akmalidin said:
it omit the electromagnetic wave.Does it omit one electromagnetic wave or a lot of them?

and EM waves are Emitted not omitted

## 1. What are electromagnetic waves?

Electromagnetic waves are a type of energy that is created by the movement of electrically charged particles. These waves are made up of both electric and magnetic fields and can travel through empty space without the need for a medium.

## 2. What is a coil and how is it related to electromagnetic waves?

A coil, also known as an inductor, is a type of electrical component that is made up of a series of loops or turns of wire. When an electric current flows through the coil, it creates a magnetic field, which can then interact with other magnetic fields to produce or receive electromagnetic waves.

## 3. How do transmitters produce electromagnetic waves?

Transmitters are electronic devices that are designed to generate and send out electromagnetic waves. They do this by using a power source to create an oscillating electric current, which is then amplified and sent through an antenna. The antenna helps to focus and direct the electromagnetic waves in a specific direction.

## 4. What is the role of energy in electromagnetic waves?

Energy is a crucial component of electromagnetic waves as it is what allows them to travel through space. The energy of an electromagnetic wave is determined by its frequency, with higher frequency waves containing more energy. Electromagnetic waves are also used to transfer energy, such as in the case of wireless charging devices.

## 5. How are electromagnetic waves used in our daily lives?

Electromagnetic waves have a wide range of applications in our daily lives. They are used in communication technologies, such as radio, television, and cell phones. They are also used in medical imaging, such as X-rays and MRI scans. Other uses include heating and cooking, security systems, and navigation systems.

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