FARADAY THE LEGEND By

K.A.VIJAY , S.PRADEEP Department of electrical and

electronical engg., ERODE SENGUNTHAR

ENGINEERING COLLEGE, Thudupathi

22 sep 1791 – 25 aug 1867 ( Faraday was a British chemist and physicist who contribute significantly to the study of ELECTROMAGNETISM ELECTROCHEMISTRY.)

MICHAEL FARADAY EARLY LIFE

Born on 22 September, 1791 in Newington Butts, England, UK.

3rd child of James and Margaret Faraday.

Till 13 he received basic education.

At 14, he was apprenticed to a local bookbinder George Riebau and

studied himself for next 7 years.

 In 1813, “Humphry Davy” appointed him to the job of chemical

assistant at the Royal Institution.

Married Sarah Barnard on 12 June 1821.

WHY WE SAY MICHAEL FARADAY LEGEND?

It is not an accident that Albert Einstein used to keep photos of three scientists in his office:  

Sir Isaac Newton James clerk Maxwell  Michael Faraday.

HOW FARADAY CONTRIBUTED TO ELECTRICITY? Mutual Induction. Field Theory . Electric Dynamo (modern day electric motor). Investigation of the fundamental nature of electricity. Electromagnetic Rotation. Basis of the first Law of Electrosis. Faraday’s effect. Diamagnetism.

SCIENTIFIC ACHIEVEMENTS 1821: Discovery of Electromagnetic Rotation.

1823: Gas Liquefaction and Refrigeration.

1825: Discovery of Benzene.

1831: Discovery of Electromagnetic Induction.

1834: Faraday’s Laws of Electrolysis.

1836: Invention of the Faraday Cage.

1845: Discovery of the Faraday Effect – a magneto-optical effect.

1845: Discovery of Diamagnetism as a Property of all Matter.

INVENTION OF FARADAY CAGE

( 1836) 1836 =

What it is? Is an enclosure formed by conductive material. Used to block electric fields.

FARADAY CAGE EFFECT

The Faraday cage, Discovered in 1836, depends on the following 2 principles:

• A Faraday cage is an enclosed conducting shell.• This hollow conducting shell will have no electric field inside. This Faraday cage effect causes Faraday cages to act as shields for

strong electric fields or other electrical effects.

OPERATION OF FARADAY CAGE

An external electrical field leads to rearrangement of the charges, and this

cancels the filed inside. Electric fields (applied externally) create forces on

electrons in the conductor, creating a current, which will further result in

charge rearrangement. The current will cease when the charges

rearrange and the applied field inside is cancelled.

IMAGE EXPLAINS FARADAY CAGE OPERATION

APPLICATION OF FARADAY CAGE Safety against lightening: The cage protects the interior of the vehicle from the

strong electric fields. Microwave : The metal shell of the microwave acts as a Faraday cage. Protections for electronic goods : Electronic equipment can be shielded and

protected from stray electromagnetic fields by using coaxial cables that contain a conducting shell that acts as a Faraday cage.

Protective suits for linemen: linemen often wear protective suits that act as Faraday cages while working with high voltage power lines. These suits protect them from getting electrocuted.

MRI (Magnetic resonance imaging) scan rooms are good examples of a Faraday cage. External radio frequency signals are prevented from interfering with the data coming from the patient

IMAGE FOR APPLICATION

MRI SCANING ELEVATOR

PROTECTNG CAR AIRPLANE FROM LIGHTING COMPARTMENT

CONCLUSION A good scientist should always have the spirit of inquiry. His open mindedness lead him into being a significant contributor to electricity. Faraday was a man of honor who was strong in his convictions. He also had a lot of patience and objectivity but above everything, he is a hard

worker.

(1791 to 1867)

AWARDS

1832 : COPLEY MEDAL

1835 : ROYAL MEDAL

1838 : COPLEY MEDAL

1846 : RUMFORD MEDAL ROYAL MEDAL

1866: ALBERT MEDAL

“But still try, for who knows what is possible”

THANKING YOU#

THIS SLIDES IS NOT A

END OF THE LEGEND!!!