Abstract:
In today's culture,
electromagnetic fields (EMF)
are all around us. It is
commonly known that being
exposed to powerful fields can
have immediate impacts, such
as burns. However, there is
also concern that sustained
exposure to weak fields could
have negative health effects
due to a process that is still
being investigated. Due to the
previously extensive exposure,
even minor health consequences
may have significant public
health consequences.
Besides radiation which is the
field that uses
electromagnetic energy the
most ,but electromagnetic
energy is used in many other
things such as generators,
motors, loudspeakers, computer
hard disks, spacecraft
propulsion systems, MRIs,
particles
accelerators, cyclotrons,
control switches etc.
Introduction:
Electromagnetic fields happen
as a result of using
electricity, electronic
security systems, and numerous
wireless communication
technologies. With the use of
electricity and other types of
artificial and natural
illumination, invisible energy
fields known as electric and
magnetic fields (EMFs) and
radiation are created.
According to their frequency,
EMFs are often divided into
one of two categories:
-Non-ionizing: Low-level
radiation that is typically
regarded as being safe for
people.
-Ionizing radiation is highlevel radiation that has the
potential to harm DNA and
cells.
A wide range of
electromagnetic fields,
including as static fields,
radio frequency fields, UV
radiation, visible light, and
X-ray radiation, are included
in the electromagnetic
spectrum. The frequency or
wavelength of electromagnetic
fields can be used to describe
them, with the wavelength
having an inverse relationship
to the frequency. The
objective of this research is
to discuss the advantages and
disadvantages of
electromagnetic energy in our
life.
-Advantages:
Magnetic energy is pure energy
as electrons are present
everywhere. Thus, it doesn't
pollute the environment the
way coal and oil do, nor do we
need to harm the ecosystem to
obtain the basic materials.
Although radiation is mostly
made of electromagnet and
permanent magnet, but
electromagnetic energy doesn't
contain any radioactive
elements that could violently
explode or remain producing
radioactivity for a quite long
time. One of the greatest
advantages of electromagnetic
energy that its renewable as
its produced from electrons
and magnetism which can never
run out.
Electricity is multifunctional
in addition to being clean and
renewable. On incredibly small
scales, like in microchips,
electricity can be made to
function. No other power
source even comes remotely
close to compressing a lot of
information processing power
into a small energy-consuming
package.
Electromagnetic energy is not
only permanent magnet it can
be stronger by giving more
energy supply.
These magnets' poles can also
be altered by altering the
current's flow. In the
industrial setting, magnetic
separators are created by
using this property of
electromagnets. When the
magnetic field needs to
discontinue or change poles,
electromagnets come in very
handy. This characteristic of
electromagnets is effectively
used in a magnetic separator.
Iron scrap is separated from a
pile of scrap using this
magnetic separator.
Electromagnets also have the
advantages of being affordable
and simple to construct. They
don't harm the test piece,
which is a component of the
electromagnet, and are
lightweight. An
electromagnet's magnetic field
strength can be easily altered
by altering the current
flowing through its solenoid.
-Disadvantages:
The main disadvantage is
related to human health,
because overexposure to some
forms of electromagnetic
radiation can be
dangerous. The more energy
that radiation carries and the
higher its frequency, the
greater the chances that it
will affect the body:
-Radio waves:
A very slight temperature
increase of up to 0.2 oC is
one of the few recognized
impacts of radio waves on the
human body. Although this
hasn't been completely
confirmed, some people claim
that very low frequency radio
waves from nearby mobile phone
base stations and high power
cables have affected their
health.
-Microwaves:
can cause internal heating of body
tissues microwave ovens affect the
nutritional value of vegetables,
making them unsafe to eat. For
example, they destroy the anti-cancer
properties of different vegetables,
such as garlic, as shown in numerous
studies describing how microwave
oven heating destroyed garlic's anticarcinogenesis property.
-Wifi Signals:
Many experiments on rats by
using Wi-Fi signal are
reported. The
main objective of these
experiments is to identify the
changes in the rat after the
exposure of EMR with different
frequency ranges. The
effects of long-term exposure
to Wi-Fi type radio frequency
(RF) signals, two hours per
day during one month may
cause Alzheimer’s disease.
The exposure of EMR may cause
many changes in the rat brain.
-Effect on Plants:
Studies have shown the effects
of cell phone EMR on growth.
An experiment was accomplished
by test seeding for four
weeks. Finally, the research
concluded that these
radiations may cause many
changes in the weight and
growth of plants,
thickness level of the stem,
etc. The progressive decline
of trees near to cell phone
tower has also been reported.
The long terms exposure of
low-frequency EMR from home
appliances can
cause health problem such
as:
1. Hyperactivity
2. sleep disorder
3. Emotional instability
References:
1. https://www.bbc.co.uk/bi
tesize/guides/zfm8382/re
vision/5
2. https://www.europeanrevi
ew.org/wp/wpcontent/uploads/31213128.pdf
3. https://www.twiglobal.com/technicalknowledge/faqs/faq-whatare-the-advantages-anddisadvantages-ofutilising-a-permanent-
magnet-for-magneticparticle-inspections
4. https://www.niehs.nih.go
v/health/topics/agents/e
mf/index.cfm
5. https://www.ehow.co.uk/h
ow_7803931_check-coilstihl-fs-66.html