1 / 34

Exam Friday!!

Exam Friday!!. (Review thing on Wednesday). Power Transmission:. Power Transmission:. City. Power plant. Transmission lines. City. Power plant. Transmission lines. The lower the voltage we transmit power at …. the larger the current that must flow ….

ofira
Download Presentation

Exam 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. Exam Friday!! (Review thing on Wednesday)

  2. Power Transmission:

  3. Power Transmission:

  4. City Power plant Transmission lines

  5. City Power plant Transmission lines

  6. The lower the voltage we transmit power at …. the larger the current that must flow …. the larger ohmic losses in the transmission lines …. So, there’s less power left for the city! Moral: it’s good to use as high a voltage as possible to transmit electrical energy!

  7. Power Transmission: The Moral 100kV Step down Step up

  8. Transformers:

  9. The Primary:

  10. The Primary:

  11. The Primary:

  12. The Secondary: The Primary:

  13. The Secondary: The Primary:

  14. The Secondary: The Primary:

  15. Input (primary) Output (secondary) Step-up transformer Step-down transformer

  16. [ 90-99% efficient]

  17. 100 kV 400 V 120 V 9-12 V

  18. The wall-wart:

  19. The wall-wart:

  20. The wall-wart:

  21. The handy transformer review sheet

  22. Clip show review

  23. More room ….

  24. The voltage divider (Series circuit):

  25. Parallel Circuit

  26. Number example ( all C = 10 mF) The historic page

  27. Problem.0.v1: what are voltages across, and charges of each Cap?

  28. Problem.1.v1: what are voltages across, and charges of each Cap?

  29. Example: A straight power line carries 30A and is perpendicular to the Earth’s magnetic field (0.50 × 10-4 T ). What magnitude of force is exerted on 100m on this wire?

  30. Example: Force on p+or e−

More Related