02.15A · Cours 15 — Magnétisme I

Course 15 — Magnetism I

1. Physique · 36 pages

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Electrokinetics II Review

1Kirchhoff's Laws 2RC Circuits and Time Constant

3Lecture Outline 4Introduction to Electromagnetism

5Dipoles, North and South 6B Field and Test Compass

Magnetic Force and Field

7Torque on a Compass Needle

Magnetic Field Lines

8Closed-Loop Property 9Zero Flux Through Closed Surfaces

Magnetic Field Strength

10Tesla Unit and Typical Values 11MEG, MCG and SQUIDs

Earth's Magnetic Field

12Dipole, Declination and Reversals

Atomic Magnetism

13Orbital Motion and Spin 14Dia-, Para-, Ferromagnetism

Current and Magnetic Field

15Oersted, Biot-Savart, Right-Hand Rule

16Law Statement and μ₀ 17Long Straight Wire Derivation 18Worked Example: Trolleybus Line

Circular Loop Field

19Loop Concentrates Field Lines 20Flattened Loop Cancellation 21Biot-Savart: B = μ₀NI/2R

22Solenoid Structure and Field Pattern 23Ampère's Law: B = μ₀nI

24Definition: F = qv × B 25No Work, Direction Change Only 26Circular Trajectory in B Field 27Cyclotron Radius and Storage Rings

28Derivation: F = IlB sinθ 29Illustration

Torque on a Current Loop

30Forces on Rectangular Coil 31Visual Demonstration 32Derivation: τ = NIAB sinφ

Magnetic Dipole Moment

33Definition: μ = NIA 34Potential Energy: Ep = −μ·B

Moving-Coil Galvanometer

35Torque-Based Current Measurement

36Next Exercise Session

02.15APage 1Electrokinetics II ReviewKirchhoff's Laws

Cours 15 — Magnétisme I page 1

02.15APage 2Electrokinetics II ReviewRC Circuits and Time Constant

Cours 15 — Magnétisme I page 2

02.15APage 3Magnetism ILecture Outline

Cours 15 — Magnétisme I page 3

02.15APage 4Magnetism IIntroduction to Electromagnetism

Cours 15 — Magnétisme I page 4

02.15APage 5Magnetism IMagnetic PolesDipoles, North and South

Cours 15 — Magnétisme I page 5

02.15APage 6Magnetism IMagnetic PolesB Field and Test Compass

Cours 15 — Magnétisme I page 6

02.15APage 7Magnetism IMagnetic Force and FieldTorque on a Compass Needle

Cours 15 — Magnétisme I page 7

02.15APage 8Magnetism IMagnetic Field LinesClosed-Loop Property

Cours 15 — Magnétisme I page 8

02.15APage 9Magnetism IMagnetic Field LinesZero Flux Through Closed Surfaces

Cours 15 — Magnétisme I page 9

02.15APage 10Magnetism IMagnetic Field StrengthTesla Unit and Typical Values

Cours 15 — Magnétisme I page 10

02.15APage 11Magnetism IMagnetic Field StrengthMEG, MCG and SQUIDs

Cours 15 — Magnétisme I page 11

02.15APage 12Magnetism IEarth's Magnetic FieldDipole, Declination and Reversals

Cours 15 — Magnétisme I page 12

02.15APage 13Magnetism IAtomic MagnetismOrbital Motion and Spin

Cours 15 — Magnétisme I page 13

02.15APage 14Magnetism IAtomic MagnetismDia-, Para-, Ferromagnetism

Cours 15 — Magnétisme I page 14

02.15APage 15Magnetism ICurrent and Magnetic FieldOersted, Biot-Savart, Right-Hand Rule

Cours 15 — Magnétisme I page 15

02.15APage 16Magnetism IAmpère's LawLaw Statement and μ₀

Cours 15 — Magnétisme I page 16

02.15APage 17Magnetism IAmpère's LawLong Straight Wire Derivation

Cours 15 — Magnétisme I page 17

02.15APage 18Magnetism IAmpère's LawWorked Example: Trolleybus Line

Cours 15 — Magnétisme I page 18

02.15APage 19Magnetism ICircular Loop FieldLoop Concentrates Field Lines

Cours 15 — Magnétisme I page 19

02.15APage 20Magnetism ICircular Loop FieldFlattened Loop Cancellation

Cours 15 — Magnétisme I page 20

02.15APage 21Magnetism ICircular Loop FieldBiot-Savart: B = μ₀NI/2R

Cours 15 — Magnétisme I page 21

02.15APage 22Magnetism ISolenoid FieldSolenoid Structure and Field Pattern

Cours 15 — Magnétisme I page 22

02.15APage 23Magnetism ISolenoid FieldAmpère's Law: B = μ₀nI

Cours 15 — Magnétisme I page 23

02.15APage 24Magnetism ILorentz ForceDefinition: F = qv × B

Cours 15 — Magnétisme I page 24

02.15APage 25Magnetism ILorentz ForceNo Work, Direction Change Only

Cours 15 — Magnétisme I page 25

02.15APage 26Magnetism ILorentz ForceCircular Trajectory in B Field

Cours 15 — Magnétisme I page 26

02.15APage 27Magnetism ILorentz ForceCyclotron Radius and Storage Rings

Cours 15 — Magnétisme I page 27

02.15APage 28Magnetism ILaplace ForceDerivation: F = IlB sinθ

Cours 15 — Magnétisme I page 28

02.15APage 29Magnetism ILaplace ForceIllustration

Cours 15 — Magnétisme I page 29

02.15APage 30Magnetism ITorque on a Current LoopForces on Rectangular Coil

Cours 15 — Magnétisme I page 30

02.15APage 31Magnetism ITorque on a Current LoopVisual Demonstration

Cours 15 — Magnétisme I page 31

02.15APage 32Magnetism ITorque on a Current LoopDerivation: τ = NIAB sinφ

Cours 15 — Magnétisme I page 32

02.15APage 33Magnetism IMagnetic Dipole MomentDefinition: μ = NIA

Cours 15 — Magnétisme I page 33

02.15APage 34Magnetism IMagnetic Dipole MomentPotential Energy: Ep = −μ·B

Cours 15 — Magnétisme I page 34

02.15APage 35Magnetism IMoving-Coil GalvanometerTorque-Based Current Measurement

Cours 15 — Magnétisme I page 35

02.15APage 36Magnetism INext Exercise Session

Cours 15 — Magnétisme I page 36