Permanent & Induced Magnetism, Magnetic Forces and Fields

• Where are the magnetic forces strongest in a magnet?

  The poles of the magnet.
• What occurs when two magnets are brought close to each other?

  They exert a force on each other.
• What type of force is exerted by two like poles of a magnet?

  A repulsive, non-contact force.
• What type of force is exerted by two unlike poles of a magnet?

  An attractive, non-contact force.
• What is the difference between a permanent magnet and an induced magnet?

  • Permanent magnet: produces its own magnetic field.
  • Induced magnet: becomes magnetic in a magnetic field.
• What type of force does induced magnetism always cause?

  A force of attraction.
• What happens to an induced magnet when it is removed from a magnetic field?

  It loses most/all of its magnetism.
• What is a magnetic field?

  The region surrounding a magnet with non-contact force.
• What are four examples of magnetic materials?

  1. Iron
  2. Steel
  3. Cobalt
  4. Nickel
• What can be said about the force between a magnet and a magnetic material?

  It is always attractive.
• How does the strength of a magnetic field change with distance from the magnet?

  The magnetic field strength decreases with distance.
• In what direction does a magnetic field point?

  From north pole to south pole of a magnet.
• What does a magnetic compass contain?

  A small bar magnet that points direction.