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Transcript

Life Story

English physician

Natural philosopher

Father of electricity and magnetism

Queen Elizabeth

'De Magnete'

Born on the 24 of May, 1544

England

Studied at St. John’s College, Cambridge

University

Bachelor’s, master’s and doctoral degrees )

Medical practice

Research into both electricity and magnetism

President of Royal College of Physicians in 1600

Physician to Queen Elizabeth I

Died on November 30, 1603

The start

Intrigued by the mystery's that sorounded magnetism

Conducted experiments for about 17 years to better the understanding of the phenomenon of magnetism

Magnetic forces produced circular motions

Discovery of the earth’s magnetic field

Earth had a magnetic core

Centre of the Earth was made up of iron

Two hemispheres

Basic terminology

Gilbert also developed the versorium

Electrical measuring instrument

De Magnete

For 200 years was the most important thesis on the subject of magnetism

Loadstone does not attract iron with equal force at every point

For the loadstone has points

Nearest the poles are the stronger

explained how a compass works

Needle has polarised ends of opposite forces

verticity

Metal can be magnetically charged by a magnet

Magnetism can impact the weight of metals

Five types of magnetic movements

“These movements are attractions of homogenous parts toward one another or toward the Main conformation of the whole earth"

COITION (commonly called attraction)

• an impulsion to magnetic union; DIRECTION towards the earth’s poles

• verticity of the earth toward determinate points in the universe and the standstill there VARIATION

• deflection from the meridian-this we call a perverted motion

• Declination (inclination or dip), a descent of the magnetic pole beneath the horizon

• circular movement or REVOLUTION

William Gilbert's Theory of Magnetism

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