Magnetism and Electromagnetism

• What do magnets do to other magnets?

  They repel and attract each other
• What are magnetically hard materials?

  Materials that retain magnetism after removal
• What is a magnetic field line?

  A line that represents the magnetic field direction
• How is magnetism induced in materials?

  When placed in a magnetic field
• How can the magnetic field pattern of a bar magnet be investigated?

  By using iron filings or a compass
• What happens when an electric current flows through a conductor?

  A magnetic field is produced around it