P7

• permanent magnets:

  • two permanent poles
  • Constant magnetic feild (lines always go from north to the south)
  • Closer together the lines are, Stronger the magnetic feild
  • Two poles the same will reject eachother
• Induced magnet

  • temporary magnetic feild
• Solenoid:

  • Soft metal core, like iron with wire coiled around it, and an electric Charge running through it
  • Induced magnet
  • electromagnet
  • Increase its strength: increase the coils, increase the current running through it