MAGNETISM-Ch. 36-Vites
You need to understand and be able to explain as well as give examples and diagrams:
 Characteristics (poles, always dipoles, etc....), properties and direction of Magnetic Fields in
various situations (those below).
 The two ways to produce a Magnetic Field (B): In Solids (domains) and by coils carrying
electric charges or electric current (I) and how currents can induce Magnetism on Iron.
 The properties and direction of Magnetic Fields in:
 a permanent magnet vs a non-magnetic material
http://www.factmonster.com/ce6/sci/A0859427.html
 the magnetic field (B) in a looped coil carrying an I and when it is supercoiled (also
called a solenoid)

electromagnets and what happens if one changes the direction of the current (R.H.)
 a single wire and what happens if one changes the direction of the current (R.H.)
 A constant Magnetic Field (B) can deflect a moving electric charge; B can also deflect the wire
carrying the electric current (I). The magnetic Force (F) that deflects the wire carrying I, is
perpendicular to both B and I (another R.H.)
 A galvanometer senses the magnitude of the electric current (I) in a coil by the deflection of a
magnetic needle (senses B). This apparatus can be modified to make Ammeters – measure I in
Amps; Voltmeters – measure voltage (V) in Volts and even electric motors (a rotating loop in a
magnetic field.
 Earth's Magnetic Field (B), how the core of the Earth may be producing B, prior reversals,
deflection of cosmic rays and particles.
Vocab:
magnetic poles
dipoles
compass composition and orientation
magnetic field (B) and direction (arrow)
magnetic domains
permanent magnets-composition
R.H. Rule for Magnetic Field (B) around a current-carrying wire (I)
Both R.H. Rules...http://physicsed.buffalostate.edu/SeatExpts/resource/rhr/rhr.htm
R.H.rule for the direction of B in coiled wires carrying (I)
electromagnets
the higher the current the greater the magnetic field
A moving charge or a current (I)-carrying wire can be moved by a B and the direction of the
movement or Force (F) is perpendicular to both B and I (R.H.rule-2)
Galvanometer and it's derivates.
Earth;'s B - http://www.enchantedlearning.com/subjects/astronomy/planets/earth/Magnetosphere.shtml
Questions you should be able to answer in your Textbook:
Review Q: 3,4,5,6,8,9,10,11,12,14,16,19,20
Think and Explain Q: 22,23,24,25,28,29,30,31
You should be able to CLEARLY explain in a research paper (2 page max including diagrams):
-how a speaker works.
-how a galvanometer works.
- How an electric motor works.
-TECHNOLOGY: how MRI machines work and what MRI stands for.
-TECHNOLOGY: how a tape recorder works.
-TECHNOLOGY: magnetic levitation works in trains.
-TECHNOLOGY: Security doors/gates