The document discusses the history and applications of electromagnetism in various appliances, highlighting key figures such as Hans Christian Ørsted and William Sturgeon. It explains how devices like electric doorbells, magnetic locks, and medical imaging equipment operate based on electromagnetic principles. Emphasizing its wide-ranging impact, the document covers applications from everyday items to advanced medical treatments.

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4. Describe about some
Electromagnetic based
Appliance.
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5. Keep Focus
!

6. HISTORY
Hans Christian Ørsted

7. William Sturgeon
His first electromagnet was a horseshoe-shaped piece of iron that was
wrapped with about 18 turns of bare copper wire.
HISTORY

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THE STAGE HAS BEEN SET
go ahead and discuss 5 most used electromagnetic appliance
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Reference : The basics you can find anywhere 5 Steps To Successful Storytelling Published on April 5, 2014 Featured in: Marketing & Advertising

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What is it?
How it works?

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Electric door bell works on
electromagnetism principle.
When the door bell button is put on, the
coil gets energized, and due to the
electromagnetic forces, the bell sounds.
The movement of the coil under the
electromagnetic force produces sound
which is heard over a minimum distance.

11. What is it?
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At the modern way of locking the door or a
bank safe is to have a magnetic locking device.
Either they may be having a number secret
code or a magnetic card, when it swiped opens
the door.
The number keys are stored in the magnetic
tape on the back of the card, interacts with the
magnetic card reader in the door. When the
data stored on the card and the memory
matches, the door opens.

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R
What is it?
How it works?
context

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Books, as heavy as hundreds of
kilograms can be stored in few
milligrams of memory stick.
The data are stored in electromagnetic
format in the form of bits and bytes.
Even the computer hard ware is
having a magnetic tape which works
on the electromagnetic principle.
context

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Not limiting to this, the olden day VCR’s and
VCP’s are having huge rolls of magnetic
tapes, which had data in it.
This can be recorded or read by
electromagnetic means only.
Also the computer and Televisions use high
current electromagnets to produce a beam
of electrons from the cathode ray tube.
However now a days we use LCD’s and
Plasma types.
context

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What is It?
How it works?
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Electric fans, blowers and other cooling
systems use electric motors.
These motors work on the principle of
electromagnetic induction which is the branch
of electromagnetism.
In any electrical appliance, electric motor is
moved by the magnetic field produced by the
electric current according to the Lorenz force
principle.
These motors are vary in size, rating and cost
based on the application.
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PREPARE
What we know about it?
Tell about its principal!
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19. Nowadays electromagnetic fields play a key role in
advanced medical equipment's such as
hyperthermia treatments for cancer, implants and
Magnetic Resonance Imaging (MRI).
RF range frequencies are mostly used in medical
applications.
In MRI scans works based on the
electromagnetism can scan minute details of the
human body.
The electromagnetic therapy is an alternate form
of medicine which claims to treat disease by
applying pulsed electromagnetic fields or
electromagnetic radiation to the body. 19
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Medical System

20. This type of treatments is used for wide range
of ailments such as nervous disorders,
diabetes, spinal cord injuries, asthma, etc.
Many of the medical equipment’s such as
scanners, x-ray equipment’s and other
equipment’s uses electromagnetism principle
for their functioning.
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Medical System

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—Electronics Hub
We can find enormous practical application of electromagnetism in everyday
life from domestic appliances to research applications.
In domestic applications we can observe the phenomena in lighting, heating
and kitchen appliances, in communication systems this exist in all
telecommunication equipment’s and communication networks, in industrial
systems this can be applied in motors, generators, sensor and actuator
devices.

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—Avijit Adhikary
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