Physics Magnetism and Electromagnetism

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• Magnets have a north and south pole.
• Magnets produce a magnetic field. Magnetic objects inside this magnetic field experience a force.
• Magnetic field lines go from north to south. 
• The closer the lines, the stronger the magnetic force.
• Opposite poles attract, and same poles repel.

• Compasses show the direction of magnetic fields.
• Inside a compass is a tiny bar magnet.
• The north pole of this magnet is attracted to the south pole of any other magnet it is near, so the compass needle points in the direction of the magnetic field it is in.
• You can use a compass around a magnet and trace the needle's position on some paper to build a picture of what the magnetic field lines look like.
• When they are not near a magnet, compass needles always point north. 
• This is because the Earth generates its own magnetic field, which shows that the inside of the Earth must be magnetic.

• Magnets have a north and south pole.
• Magnets produce a magnetic field. Magnetic objects inside this magnetic field experience a force.
• Magnetic field lines go from north to south. 
• The closer the lines, the stronger the magnetic force.
• Opposite poles attract, and same poles repel.

• Compasses show the direction of magnetic fields.
• Inside a compass is a tiny bar magnet.
• The north pole of this magnet is attracted to the south pole of any other magnet it is near, so the compass needle points in the direction of the magnetic field it is in.
• You can use a compass around a magnet and trace the needle's position on some paper to build a picture of what the magnetic field lines look like.
• When they are not near a magnet, compass needles always point north. 
• This is because the Earth generates its own magnetic field, which shows that the inside of the Earth must be magnetic.