1 / 7

Today4/28

Today4/28. Lab: Electromagnetic Induction Last one!. Final Exam Topics waves interference refraction lenses/mirrors E-Fields potential plates capacitance circuits B-fields. Final Exam. Tuesday, 5/13, 10:15am Witmer 116 Problems pulled from Lecture HW exams

brad
Download Presentation

Today4/28

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. Today4/28 • Lab: Electromagnetic InductionLast one! • Final Exam Topics • waves • interference • refraction • lenses/mirrors • E-Fields • potential • plates • capacitance • circuits • B-fields

  2. Final Exam • Tuesday, 5/13, 10:15am Witmer 116 • Problems pulled from • Lecture • HW • exams • We will cover a small amount of new material as we review. New material will be details of old material.

  3. Motional EMF Pos. charges cannot move, Neg. charges shift down. B Rod has net pos at top and net neg at bottom. v Rod becomes a battery with a V = EMF

  4. Right-hand wire would also have an EMF (opposing). Motional EMF If in a circuit, current will flow. B V = IR etc. Careful, only the rod can move. Why? v

  5. Motional EMF How big is EMF? B Depends on: B-field Velocity v Length of rod EMF = vBL when v, L, and B all 90°. Units of Volts (or J/Coul)

  6. Motional EMF Problem solving. B Energy conservation! Work done on bar = energy dissipated in the resistor v Newton’s laws! Force on the bar is balanced if at constant speed (Force of the external agent = mag. Force, IlB.

  7. Motional EMF What is the force on the bar by the rope if it is pulled at constant a speed of 2m/s through a 3T field? The bar is 0.5m long and the resistor is 5. B v Frictionless conducting rails

More Related