Electromagnetism IIElectromagnetism II

Week 9Week 9

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

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

Earth’s Magnetic DipoleEarth’s Magnetic Dipole

Oersted’s RuleOersted’s Rule

RHR1

SolenoidSolenoid

Solenoid (cont.)Solenoid (cont.)

RHR2

ElectromagnetElectromagnet

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

The Motor PrincipleThe Motor Principle

S NS N

Faraday’s LawFaraday’s Law

Lenz’s LawLenz’s Law

ReviewReview

RHR1RHR1 RHR2RHR2 RHR3RHR3

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

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