Electromagnetism and human health
Electromagnetism is a branch of Physics, trades with the electromagnetic force that occurs between electrically charged bits. The electromagnetic force is one of the four basic forces and exhibits electromagnetic fields such as magnetic fields, electric fields, and light. It is the basic idea electrons bound to the nucleus and responsible for the complete structure of the nucleus.
What is Electromagnetic Force?
Electromagnetic force is a type of physical communication that occurs between electrically charged particles. It acts between charged particles and is the combination of all magnetic and electrical forces. The electromagnetic force can be beautiful or repulsive.
Before the invention of electromagnetism, people or scientists used to think electricity and magnetism are two different topics. The view has changed after James Clerk Maxwell published A Treatise on Electricity and Magnetism in the year 1873. The publication states that the interplay of positive and negative charges are mediated by one force. This observation laid a foundation for Electromagnetism. Later many scientists like Michael Faraday, Oliver Heaviside, and Heinrich Hertz shared their ideas in electromagnetism.
What is Electromagnetism?
Electromagnetism is a process where a fascinating field is created by introducing the current in the conductor. When a conductor is electrically charged it generates magnetic lines of force of head. For example, if current i.e., positive charges moving in a wire, it produces the fascinating field along the wire and the direction of magnetic lines, and force can be defined using Right Hand Rule. Refer to the image for a detailed explanation.
Explanation of Electromagnetism with an Example
Strong Magnetic speakers commonly used in TV’s and Radios are perfect examples of Electromagnetic methods. Let’s see the operation of these devices which are based on the origin of electromagnetism. See the picture below.
In order to convert electrical waves into an audible sound, the speakers are designed. A metal coil is attached to a strong magnet and when current passes through the coil it generates a magnetic field. The newly formed fascinating field is repelled by the strong magnetic field resulting in the vibrations. These vibrations are increased by the cone-like structure causing the sound. This is how speakers work based on electromagnetism.
We have seen what happens when a conductor is electrically energized. Now, let’s see what happens if we place a conductor in between the magnetic field.
When a driver is placed or moved through the magnetic field it generates voltage i.e., electricity. This principle is called Electromagnetic Induction. The voltages made will be based on the speed of the head moving through the electric field. Faster the speed of the head, the greater the induced electricity or voltage.
Faraday’s Law states that whenever there is relevant motion between the magnetic field and head, the flux linkage changes and this change in flux induces a voltage across the coil.
Explanation with an example
DC Generator works on the origin of Faraday’s Law of Electromagnetic Induction. It is a system that converts fixed energy into electrical energy.
In the above figure, A square conductor width sides are placed in between a fascinating field. When the rectangular conductor rotates in between magnetics, it cuts the fascinating field thereby causing Electromagnetic field (e m f).
Frequently Asked Questions on Electromagnetism
What is Electromagnetism?
Electromagnetism is a branch of physics that includes the study of the electromagnetic force. It is a type of communication that occurs between electrically energized particles.
Define electromagnetic force?
The electromagnetic force is a force that acts between energized particles and is a combination of electrical and magnetic forces.
State Faraday’s Law?
Faraday’s Law states that whenever there is relevant motion between magnetic field and conductor, the flux linkage moves and this change in flux produces a voltage across the coil.
Define electromagnetic induction?
Electromagnetic reason is the production of an electromotive force across an electrical engineer in a changing magnetic field.
List a few properties of the electromagnetic wave?
A few properties of electromagnetic waves are:
- Electromagnetic waves are propagated by oscillating waves electrical and inviting waves oscillating at right angles to each other
- They exhibit the properties of interference and diffraction
- They travel at a speed of 3 × 108 m/s in a vacuum.
- They are transverse waves.
- The relationship between the wavelength (λ) and frequency (c) of an electromagnetic wave is given as follows:
c = v λ
List a few applications of electromagnetism?
A few applications of electromagnetism are:
- Electromagnetism serves as a fundamental working principle for many of the home appliances in-home applications.
- The Maglev trains or high-speed trains work on the principle of electromagnetism.
- Electromagnetic emissions are used in the communication system to transfer data from the source to the receiver
- In industries, starting from small devices to large power equipment, electromagnetism is used at least at one step of their work.
The effects of electromagnetic fields on human health
Since the start of the 20th century, we are overwhelmed by the increasing sources of the Electromagnetic Field (EMF) that is growing from telecommunication, electricity, appliances, medical equipment, and many other apparatus that we use in our daily life. Although these new technologies became necessary and indispensable, the EMF they produce may cause health risks and risks to humans.
Some studies show a link between exposure to EMF and an increased rate of Leukemia, disease, brain tumors, and other health problems. Also, there is some uncertainty remains as to the actual devices responsible for these biological hazards and which type of fields magnetic or electric or both are of great concern.
It is needless to say that no matter the results of these EMFs be trivial or catastrophic, we should take all the necessary care to reduce our exposure to EMF as low as reasonably attainable. For this to occur, all those involved or influenced by this exposure should follow the RF safety standards and guidelines set forth by the regulatory authorities like the IEEE, WHO, ICNIRP, and other likewise organizations.
Any failure in taking immediate actions to the above guidelines, the public would be at a high epidemic risk of potentially fatal infections in the future.