1 / 30

Magnetic Field and Currents Practice Problems

Solve magnetic field and current problems with the given scenarios and scenarios involving long wires, currents, and magnetic forces. Includes practice questions and solutions.

gregorydaniel
Download Presentation

Magnetic Field and Currents Practice Problems

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. hitt Two long straight wires pierce the plane of the paper at vertices of an equilateral triangle as shown. They each carry 3A in the same direction. The magnetic field at the third vertex (P) has the magnitude and direction (North is up): (1) 20 μT, west (2) 17 μT, east (3) 15μT, north (4) 26 μT, south (5) none of these P 4 cm 4 cm

  2. Long, straight, parallel wires carry equal currents into or out of page. Rank according to the magnitude of the force on the central wire, largest to smallest. 1. d, c, a, b 2. a, b, c, d 3. b, c, d, a 4. c, a, b, d 5. b, d, c, a

  3. A horizontal power line carries a current of 5000 A from south to north. Earth's magnetic eld (60 μT) is directed towards north and inclined down-ward 50degreesto the horizontal. Find the magnitude and direction of the magnetic force on 100 m of the line due to the Earth's field. • 23 N, west (2) 23 N, east (3) 30N, west (4) 30N, east (5) none of these I 50 N B

  4. Chapter 30 Induction and Inductance In this chapter we will study the following topics: -Faraday’s law of induction -Lenz’s rule -Electric field induced by a changing magnetic field -Inductance and mutual inductance - RL circuits -Energy stored in a magnetic field (30 – 1)

  5. (30 – 6)

  6. N S magnet motion (30 – 7)

  7. N S magnet motion (30 – 8)

  8. S N magnet motion (30 – 9)

  9. N S magnet motion (30 –10)

  10. (30 –11)

  11. (30 –12)

  12. (30 –13)

  13. (30 –14)

  14. (30 –15)

  15. (30 –16)

  16. loop 1 loop 2 (30 –17)

  17. (30 –19)

  18. (30 –20)

  19. (30 –21)

  20. N2 N1 (30 –22)

  21. N2 N1 (30 –23)

  22. N2 N1 (30 –24)

  23. Electrons are going around a circle in a counterclockwise direction as shown. At the center of the circle they produce a magnetic field that is: e A. into the page B. out of the page C. to the left D. to the right E. zero

  24. Long parallel wires carry equal currents into or out of the page. Rank according to the magnitude of the net magnetic field at the center of the square. 1. C,D, (A,B) 2. A, B, (C,D) 3. B, A, C, D 4. D, (A, B), C

  25. Partial Loops (cont.) • Note on problems when you have to evaluate a B field at a point from several partial loops • Only loop parts contribute, proportional to angle (previous slide) • Straight sections aimed at point contribute exactly nothing • Be careful about signs, e.g.in (b) fields partially cancel, whereas in (a) and (c) they add

  26. (30 – 2)

  27. loop 1 loop 2 (30 – 3)

  28. (30 – 4)

  29. loop (30 – 5)

More Related