Magnetic Fields (04/6/11 - 04/8/11)


Objectives:

Students will...
  • describe the properties of magnets and the origin of magnetism in materials.
  • compare and contrast various magnetic fields
in order to explain the concept of magnetic fields


Vocabulary terms to know...

  • polarized
  • magnetic fields
  • magnetic flux
  • first right-hand rule
  • solenoid
  • electromagnet
  • second right hand rule
  • domain


- video: magnetic field
- Demo: magnetic field
- Teach
- Classwork


Assignments

In- class:
Use the Cornell Note handout to take notes on the following...on pages 643 - 651.

1. General properties of Magnets - What are they?
- How Magnets affect other materials
- Permanent vs temporary magnets

2. Magnetic Fields around Permanent Magnets - What does it look like?
- Magnetic Field lines
- Forces on Objects in Magnetic Fields

3. Electromagnetism - What is it?
- Magnetic field near a coil

4. Microscopic picture of Magnetic Materials.
- Magnetic domains
- recording media
- A magnetic history of earth.

Now use the notes above to write a one to two - page summary on the topic: Magnets: Permanent and Temporary

Follow -up Questions

10 - 14, pg 651
33 - 42, pg 664

Follow-up Assessment

1. Conceptual Quiz on Magnetism - next class ( 04/08/11)

4/8/11

Review concepts:
Properties of magnets -
Magnetic field around permanent magnets
Forces on objects in magnetic fields
Electromagnetism
magnetic field near a coil
microscopic picture of magnetic fields

In class Questions: 1-4, pg 647
5-9, pg 650


Quiz -

Homework (due 4/12/11)

Use Cornell Notes to take Notes on Section page 652 - 659


You notes must cover the following...

1. Forces on Currents in magnetic fields - explain how it happens
- determining the direction of the force
- Forces on a wire resulting from a magnetic field

2. Loud speakers - How they work

3. Galvanometers - How they work?
- electric motor

4. Force on a single charge paricle

5. Storing information with magnetic media- How it works.

Follow -up Questions
26 - 31, pg 659
44 - 46, pg 664

Objectives: 4/12/11

Students will...
  • relate magnetic induction to the direction of the force on a current-carrying wire in a magnetic field.
  • solve problems involving magnetic field strength and the forces on the current-carrying wires, and on moving charged particles in a magnetic fields.
  • describe the design and operation of an electric motor.
in order to explain the concept of forces caused by magnetic fields.


Vocabulary terms to know...

  • third right-hand rule
  • galvanometer
  • electric motor
  • armature