1 / 26

Exam next Friday!!

Reminder:. Exam next Friday!!. April 11 Bring a pencil and a calculator! Cheat sheet is up now … HW8 due on Wednesday. Electric power generation. (Motional EMF). uniform. uniform. uniform. Click for animation!. uniform. uniform. Motional EMF.

qiana
Télécharger la présentation

Exam next Friday!!

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Reminder: Exam next Friday!! April 11 Bring a pencil and a calculator! Cheat sheet is up now … HW8 due on Wednesday

  2. Electric power generation (Motional EMF)

  3. uniform

  4. uniform

  5. uniform Click for animation!

  6. uniform

  7. uniform

  8. Motional EMF What’s the EMF and direction of current flow?

  9. Number example!

  10. Now, look at this another way! (microscopic)

  11. uniform

  12. uniform q

  13. What is the work done by ?

  14. SUMMARY Macroscopic point of view: From Faraday’s law, we concluded that the moving bar develops an EMF: Microscopic point of view: Considering the force on an individual charge carrier inside the bar, we also concluded that the bar develops an EMF:

  15. Net forces on conductors? Do you get something for nothing? i.e. how do you keep bar moving?

  16. RHR # 1 and 2

  17. To move at constant :

  18. Number example! What external force is required?

  19. External Power supplied? Internal Power dissipated? Note Lenz’s Law at work -- you have to supply external power to make electrical power! Eddy current demo

  20. Let’s make an AC generator (Alternator) N S

  21. Let’s make an AC generator (Alternator) N S Click for animation!

  22. Let’s make an AC generator (Alternator) N S

  23. Let’s make an AC generator (Alternator) N S Generator sim http://phet.colorado.edu/en/simulation/generator

  24. Wall current: 120 VRMS at 60 Hz: Suppose you have A = 0.5 m2 and B = 0.1 T. How many turns do you have to have?

More Related