1. Magnetism Aim: How do magnets work?

2. Atomic Structure of Magnets The difference between magnetic and non- magnetic materials is how their atoms are arranged If the atoms are all arranged in the same “direction” their electrons are able to move freely in order to create a magnetic field

3. Magnetic Facts Magnets ALWAYS have two poles (Dipole) – A North pole & a South pole Currently, it is IMPOSSIBLE to have a magnetic monopole – If one successfully creates a magnetic monopole = $$$ So no matter how many times you break a magnet, each new piece will have a north and south pole Opposite poles always ATTRACT while identical poles REPEL

4. Magnetic Field Lines Also known as MAGNETIC FLUX LINES, always point AWAY from the NORTH pole and point TOWARD the SOUTH pole Magnetic Flux lines never cross each other

5. Magnetic Field Lines

6. The Geographic North Pole is THE MAGNETIC SOUTH POLE The Geographic South Pole is THE MAGNETIC NORTH POLE

7. Electromagnetism A magnetic field can be generated by moving electrons in a conductor Likewise, if a conductor moves within a magnetic field, it can cause electrons to move If moving electrons create Current, then a current must have a Voltage to exist This phenomena is called ELECTROMAGNETIC INDUCTION

8. Electromagnetic Induction In order for Electromagnetic Induction to exist the conductor must “cut through” the magnetic flux lines If the conductor moves along the flux lines, then no potential difference is generated NS

9. Summary How are the magnetic flux lines oriented around… – The North Pole? – The South Pole? How do opposite poles behave when they are close to each other? How do identical poles behave when they are close to each other? Describe electromagnetism How is a potential difference generated with a magnetic field and a conductor?