Agenda                  Bell work• Magnet activity                               • Pick up and complete• Notes: Electricit...
Electric Currents,Magnetic Fields       May 7, 2012
Objectives1.   Describe the magnetic field produced by a     current-carrying wire2.   Give examples of how the field can ...
We KNOW Electric wire can be made to have a current Magnet has a magnetic field surrounding it
Interaction An electric current produces a magnetic field Magnetic field makes up a pattern of circles
 When the current is reversed the direction of the  magnetic field is also reversed If a current carrying wire is looped...
Electromagnets If a piece of iron is placed in a current-  carrying coil of wire, the iron will become a  magnet – electr...
Magnetic Forces on Wires If an electric current can produce a magnetic  field Then, we can use a magnetic field to chang...
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Electric currents, magnetic fields

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Electric currents, magnetic fields

  1. 1. Agenda Bell work• Magnet activity • Pick up and complete• Notes: Electricity and Crossword Puzzle Magnetism• Electromagnetic Induction• Circuits and Power Quiz tomorrow• Outline Chp. 14 pg 235-245• Review Questions 1-17
  2. 2. Electric Currents,Magnetic Fields May 7, 2012
  3. 3. Objectives1. Describe the magnetic field produced by a current-carrying wire2. Give examples of how the field can be made stronger
  4. 4. We KNOW Electric wire can be made to have a current Magnet has a magnetic field surrounding it
  5. 5. Interaction An electric current produces a magnetic field Magnetic field makes up a pattern of circles
  6. 6.  When the current is reversed the direction of the magnetic field is also reversed If a current carrying wire is looped the magnetic field is intensified More loops means greater magnetic field
  7. 7. Electromagnets If a piece of iron is placed in a current- carrying coil of wire, the iron will become a magnet – electromagnet (temporary magnet) Roller coasters Junk yards Electric trains
  8. 8. Magnetic Forces on Wires If an electric current can produce a magnetic field Then, we can use a magnetic field to change an electric current We can use the combination of both to create a motor
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