Magnetism and Induction

Syllabus, Handouts and PowerPoints for this unit: Calendar | Handouts | Lectures

Labs for this unit: Magnet Design Lab .:. Magnaprobe Lab .:. Specific Heat of Water .:. Index of Refraction

Labs for this unit: Faraday's Law .:. Faraday's Law ILD

Homework Problems: Ch 20: 3, 9, 16 Ch 21: 5, 13, 15

Group Quizzes: 20ABCD .:. 21ABCEF

Ch 20 Assessments: 20.1-Right Hand Rules .:. 20.2-Forces on Wires and Particles .:. 20.3-Ampere's Law

Ch 21 Assessments: 21.1-Lenz's Law .:. 21.2-Faraday's Law

Study for the: IB Magnetism Test

Chapter 20: Magnetism

20A. Basic Magnetism, and Right Hand Rules for magnetic fields

Noteguide20A-BasicMagnetism.docx

Basic Magnetism:

1.Right Hand Rule for the force a magnetic field exerts on a current carrying wire:

2. Right hand rule for the magnetic field around a wire:

3. Right Hand Rule for finding the North pole of a current carrying wire loop:

4. Solving "Map" problems (NESW):

20B. Calculating the magnitude of the force on current carrying wires

Noteguide20B-ForceOnWires.docx

Calculating Magnetic Force on a Wire:

Example of Force on a Wire

Whiteboards:

20C. Solve problems with moving particles in a magnetic field.

(Be sure to watch all 3 parts)

Noteguide20C-ParticlesInAMagneticField.docx

Part 1: Calculating the force on a moving charged particle in a magnetic field:

Whiteboards:

Charged Particles Ex#1

Charged Particles Ex#2

Part 2: Relating magnetic force to centripetal force, and doing calculations with radius of path:

Whiteboards:

Charged Particles Radius Ex#1

Charged Particles Radius Ex#2

Part 3: Figuring out the direction the particle spins: (The right hand rule you use)

Force on current carrying wires

Whiteboards:

Charged Particles Path Ex#1

Charged Particles Path Ex#2

Charged Particles Path Ex#3

Charged Particles Path Ex#4

Charged Particles Path Ex#5

Charged Particles Path Ex#6

Charged Particles Path Ex#7

Charged Particles Path Ex#8

Charged Particles Path Ex#9

Particle accelerators that use magnetic fields to make charged particles go in circles:

Why the Northern lights are Northern (or Southern):

20D. Solve problems with crossed fields

Noteguide20D-CrossedFields.docx

Part 1: The directions in Crossed Fields problems.

Examples

Crossed Fields Direction Example 1
Crossed Fields Direction Example 2
Crossed Fields Direction Example 3
Crossed Fields Direction Example 4
Crossed Fields Direction Example 5
Crossed Fields Direction Example 6
Crossed Fields Direction Example 7
Crossed Fields Direction Example 8

Noteguide20D-CrossedFields.docx

Part 2: Solving Problems with crossed E and B fields:

Try this one:

Crossed Fields Example

Mass Spectrometers:

20E. Understand the Hall effect.

Noteguide20E-HallEffect.docx

The Hall Effect:

20F. Understand how magnetization works with domains and hysteresis

Noteguide20F-HysteresisAndMagnetization.docx

How those freaking magnets work:

20G. Apply magnetism to understand how galvanometers, speakers and motors work.

Noteguide20G-MotorsGalvanometersSpeakers.docx

Motors, Galvanometers, and Speakers:

20H. Apply Ampere's law to a long straight wire and solenoids:

Noteguide20H-AmperesLaw.docx

Ampere's Law for B field around a wire:

Whiteboards:

Ampere's Law Example #1

Ampere's Law Example #2

Ampere's Law Example #3

Ampere's Ghost (Scary - but true)

Solving for the magnetic force between two current-carrying wires:

Whiteboards:

Two Wires Example #1

Two Wires Example #2

Applying Ampere's Law to Solenoids:

Whiteboards:

Solenoids Ex #1

Solenoids Ex #2

20I. Define the Ampere in terms of meters and Newtons

Noteguide20I-TheAmpere.docx

The definition of an Ampere: (memorize this)

20K. Understand the basic magnetic field lines around long solenoids, flat solenoids, and straight wires.

Noteguide20K-BasicFieldPatterns.docx

Common B field Patterns:

Chapter 21: Induction

21A. Predicting the direction of current induced by changing magnetic flux using Lenz's Law

Noteguide21A-LenzsLaw.docx

Direction of induced currents:

21B. Use Faraday's Law to calculate EMFs and Currents in loops or solenoids.

Noteguide21B-FaradaysLaw.docx

Faraday's Law for loops:

Whiteboards:

Faraday's Law Whiteboard #1

Faraday's Law Whiteboard #2

Faraday's Law Whiteboard #3

21C. Use Faraday's Law to calculate EMFs on moving conductors.

Noteguide21C-MovingConductors.docx

Part 1 - EMF in Moving Conductors:

Whiteboards:

Moving Conductor Whiteboard #1

Moving Conductor Whiteboard #2

Moving Conductor Whiteboard #3

Part 2 - Direction of EMF in Moving Conductors

Examples:

Direction in Moving Conductors Example 1
Direction in Moving Conductors Example 2
Direction in Moving Conductors Example 3
Direction in Moving Conductors Example 4
Direction in Moving Conductors Example 5
Direction in Moving Conductors Example 6
Direction in Moving Conductors Example 7
Direction in Moving Conductors Example 8

21D. Use Faraday's Law to calculate EMF generated by an alternator.

Noteguide21D-Alternators.docx

Alternators:

21E. Use Faraday's Law to calculate voltages and currents in transformers.

Noteguide21E-Transformers.docx

Solving for Voltage, Current and Power in Transformers:

Whiteboards:

Transformer Whiteboard #1

Transformer Whiteboard #2

Transformer Whiteboard #3

21F. Calculate the power loss on transmission lines and show why we transmit AC power at high voltages.

Noteguide21F-TransmissionOfPower.docx

Transmission of Power:

Whiteboards:

Transmission of Power Whiteboard #1

Transmission of Power Whiteboard #2

Transmission of Power Whiteboard #3

Transmission of Power Whiteboard #4

21G. Have a basic understanding about Maxwell's Equations

Noteguide21G-MaxwellsEquations.docx

Maxwell's Equations:

Stuff at the bottom

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