Magnetism (part 8)

Magnetism (part 8) - Magnetism Lecture 09: Electromagnetic...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Magnetism Lecture 09: Electromagnetic Induction (Knight:33.1-33.4) x x x x x x x x x x x x x x x x x x v F B q → → → → → → → → → → v F B q × ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ v F = 0 B q B v q E q F × + =
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Physics 113 Dr. Renat Letfullin 2 The History of Induction Faraday’s Discovery Motional EMF Induced Current in a Circuit Force and Induction Energy Considerations Eddy Currents Magnetic Flux Lenz’s Law Today. . .
Background image of page 2
Physics 113 Dr. Renat Letfullin 3 In 1831, Joseph Henry, a Professor of Mathematics and Natural Philosophy at the Albany Academy in New York, discovered magnetic induction. In July, 1832 he published a paper entitled “On the Production of Currents and Sparks of Electricity from Magnetism” describing his work. Because Henry published after Michael Faraday, he did not receive much credit for this discovery, which actually preceded Faraday’s. The History of Induction Joseph Henry ( 1797-1878) Michael Faraday (1791-1867) Michael Faraday's ideas about conservation of energy led him to believe that since an electric current could cause a magnetic field, a magnetic field should be able to produce an electric current. He demonstrated this principle of induction in 1831 and published his results immediately. The principle of induction was a landmark in applied science, for it made possible the dynamo, or generator, which produces electricity by mechanical means.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Physics 113 Dr. Renat Letfullin 4 Faraday’s Discovery Faraday had wound two coils around the same iron ring. He was using a current flow in one coil to produce a magnetic field in the ring, and he hoped that this field would produce a current in the other coil. Like all
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 17

Magnetism (part 8) - Magnetism Lecture 09: Electromagnetic...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online