Paper 2

• Poles of a magnet

  • Places where the magnetic forces are strongest
• When two magnets are brought close together

  They exert a force on each other
• Like poles

  Repel each other
• Unlike poles

  Attract each other
• Attraction and Repulsion between two magnetic poles

  Examples of a non-contact force
• Permanent magnet

  Produces its own magnetic field
• Induced magnet

  Material that becomes a magnet when placed in a magnetic field
• Induced magnetism

  Always causes a force of attraction when removed from the magnetic field
• Induced magnet

  Loses most/all of its magnetism quickly
• Magnetic field

  The space around the magnet where a force acts on another magnet or magnetic material
• The force between a magnet and a magnetic material is always one of attraction
• The strength of the magnet and a magnetic field depends on the distance from the magnet
• The magnetic field is strongest at the poles of the magnet
• Earth's magnetic field


  A magnetic compass contains a small bar magnet that points in the direction of the Earth's magnetic field
• When a current flows through a conducting wire, a magnetic field is produced around the wire
• The strength of the magnetic field depends on the current through the wire and the distance from the wire
• Right-hand grip rule


  Imagine gripping a wire with your right hand. Your thumb points in the current direction, and the magnetic field lines go from your wrist to your finger.
• Magnetic field around a solenoid


  • The magnetic field is strong and uniform.
• The magnetic field around a solenoid is strong and uniform.
• If you add a core made of a magnetic material to a solenoid, it increases the magnetic strength and makes an electromagnet.