c7 - magnetism

• opposite poles attract, same poles repel
• What are permanent magnets?


  they are always magentic
• What is induced magnetism?

  when a magnetic materials becomes a magnet when it is in a magnetic field only
• A solenoid is a loop of wire coiled into a cylindrical shape
• To increase the force acting on a coil you can - increase current, increase magnetic field strength to increase the number of turns on the coil