1. PLAYING THE MAGNETIC FIELD

2. Magnetism Magnetism is a FIELD FORCE
Acts over a DISTANCE without CONTACT
Magnets produce FIELDS around them that influence some types of metal
IRON, NICKEL, and COBALT
Closely related to ELECTRICITY

3. Magnetic Field Lines Magnetic fields can be represented using
FIELD LINES drawn around magnetic objects
Magnetic fields lines travel from NORTH poles
to SOUTH poles OUTSIDE magnets
Field lines DO NOT CROSS one another

4. Where do magnets come from?
Oersted observed… moving a CHARGED OBJECT makes a MAGNETIC FIELD
Magnetic field around a current carrying wire

5. Magnetic field around a current carrying wire

6. One HUGE Magnet Around 1600, William Gilbert proposed
that the EARTH is a giant magnet
Current theory states:
Convection currents in
the Earth’s LIQUID,
OUTER IRON core
cause it to have
a strong magnetic field
What gives the EARTH its magnetic field?

7. The Earth’s Magnetosphere
What is so important about
Earth’s magnetosphere?
Preserves atmosphere by blocking ‘solar wind’
Protects life on Earth from ‘some’
cosmic ray radiation