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PHYS 270 – SUPPL. #7

PHYS 270 – SUPPL. #7. DENNIS PAPADOPOULOS FEBRUARY 17, 2010. 1. Electromagnetic Induction. Topics: Induced Currents X Motional emf X Magnetic Flux X Lenz’s Law X Faraday’s Law X Induced Fields X Induced Currents Applications Generators –Transformers Inductors LC and LR Circuits.

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PHYS 270 – SUPPL. #7

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  1. PHYS 270 – SUPPL. #7 DENNIS PAPADOPOULOS FEBRUARY 17, 2010 1

  2. Electromagnetic Induction Topics: Induced Currents X Motional emf X Magnetic Flux X Lenz’s Law X Faraday’s Law X Induced Fields X Induced Currents Applications Generators –Transformers Inductors LC and LR Circuits

  3. FARADAY’s LAW 5

  4. AC GENERATORS 6

  5. EDDY CURRENTS What happens if I have no wires to define current path in a metal sheet. Two whirlpools of current circulate. 7 Induced current in complete loop Causes retarding force on wire

  6. 8

  7. Transformers principle 9

  8. 10

  9. 11

  10. 12

  11. Induced E field is directly connected to a changing magnetic field

  12. INDUCTORS VS. CAPACITORS

  13. Inductors - Inductance For infinite solenoid Define the Self Inductance L as the proportionality constant in Units ?

  14. CALCULATION OF INDUCTANCE OF A SOLENOID

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