Electromagnetism II Week 9. Contents Bar Magnet Bar Magnet Earths Magnetic Dipole Earths Magnetic...

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Electromagnetism II Electromagnetism II Week 9 Week 9

Transcript of Electromagnetism II Week 9. Contents Bar Magnet Bar Magnet Earths Magnetic Dipole Earths Magnetic...

Page 1: Electromagnetism II Week 9. Contents Bar Magnet Bar Magnet Earths Magnetic Dipole Earths Magnetic Dipole Oersteds Rule (RHR1) Oersteds Rule (RHR1) Solenoid.

Electromagnetism IIElectromagnetism II

Week 9Week 9

Page 2: Electromagnetism II Week 9. Contents Bar Magnet Bar Magnet Earths Magnetic Dipole Earths Magnetic Dipole Oersteds Rule (RHR1) Oersteds Rule (RHR1) Solenoid.

ContentsContents Bar MagnetBar Magnet Earth’s Magnetic DipoleEarth’s Magnetic Dipole Oersted’s Rule (RHR1)Oersted’s Rule (RHR1) Solenoid (RHR2)Solenoid (RHR2) ElectromagnetElectromagnet Lorentz Force (RHR3)Lorentz Force (RHR3) The Motor PrincipleThe Motor Principle Faraday’s LawFaraday’s Law Lenz’s LawLenz’s Law TransformersTransformers ReviewReview

Page 3: Electromagnetism II Week 9. Contents Bar Magnet Bar Magnet Earths Magnetic Dipole Earths Magnetic Dipole Oersteds Rule (RHR1) Oersteds Rule (RHR1) Solenoid.

Bar MagnetBar Magnet

Field lines go Field lines go from North to from North to SouthSouth

Opposites Opposites attract; likes attract; likes repelrepel

A compass is A compass is a magneta magnet

Page 4: Electromagnetism II Week 9. Contents Bar Magnet Bar Magnet Earths Magnetic Dipole Earths Magnetic Dipole Oersteds Rule (RHR1) Oersteds Rule (RHR1) Solenoid.

Earth’s Magnetic DipoleEarth’s Magnetic Dipole

Page 5: Electromagnetism II Week 9. Contents Bar Magnet Bar Magnet Earths Magnetic Dipole Earths Magnetic Dipole Oersteds Rule (RHR1) Oersteds Rule (RHR1) Solenoid.

Oersted’s RuleOersted’s Rule

RHR1

Page 6: Electromagnetism II Week 9. Contents Bar Magnet Bar Magnet Earths Magnetic Dipole Earths Magnetic Dipole Oersteds Rule (RHR1) Oersteds Rule (RHR1) Solenoid.

SolenoidSolenoid

Page 7: Electromagnetism II Week 9. Contents Bar Magnet Bar Magnet Earths Magnetic Dipole Earths Magnetic Dipole Oersteds Rule (RHR1) Oersteds Rule (RHR1) Solenoid.

Solenoid (cont.)Solenoid (cont.)

RHR2

Page 8: Electromagnetism II Week 9. Contents Bar Magnet Bar Magnet Earths Magnetic Dipole Earths Magnetic Dipole Oersteds Rule (RHR1) Oersteds Rule (RHR1) Solenoid.

ElectromagnetElectromagnet

Page 9: Electromagnetism II Week 9. Contents Bar Magnet Bar Magnet Earths Magnetic Dipole Earths Magnetic Dipole Oersteds Rule (RHR1) Oersteds Rule (RHR1) Solenoid.

Lorentz ForceLorentz Force

A current experiences a force in a A current experiences a force in a magnetic field.magnetic field.

S NS N

RHR3

Page 10: Electromagnetism II Week 9. Contents Bar Magnet Bar Magnet Earths Magnetic Dipole Earths Magnetic Dipole Oersteds Rule (RHR1) Oersteds Rule (RHR1) Solenoid.

The Motor PrincipleThe Motor Principle

S NS N

Page 11: Electromagnetism II Week 9. Contents Bar Magnet Bar Magnet Earths Magnetic Dipole Earths Magnetic Dipole Oersteds Rule (RHR1) Oersteds Rule (RHR1) Solenoid.

Faraday’s LawFaraday’s Law

Page 12: Electromagnetism II Week 9. Contents Bar Magnet Bar Magnet Earths Magnetic Dipole Earths Magnetic Dipole Oersteds Rule (RHR1) Oersteds Rule (RHR1) Solenoid.

Lenz’s LawLenz’s Law

Page 13: Electromagnetism II Week 9. Contents Bar Magnet Bar Magnet Earths Magnetic Dipole Earths Magnetic Dipole Oersteds Rule (RHR1) Oersteds Rule (RHR1) Solenoid.

ReviewReview

RHR1RHR1 RHR2RHR2 RHR3RHR3

The Motor PrincipleThe Motor Principle Faraday’s LawFaraday’s Law Lenz’s LawLenz’s Law

Page 14: Electromagnetism II Week 9. Contents Bar Magnet Bar Magnet Earths Magnetic Dipole Earths Magnetic Dipole Oersteds Rule (RHR1) Oersteds Rule (RHR1) Solenoid.

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ApplicationsApplications The connection between E and BThe connection between E and B