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69 Multiple choice questions

  1. Opposite current direction causes
  2. Like poles
  3. are electrons spinning in the same direction
  4. magnetic field strength
  5. Have both a magnitude and vector
  6. Electrons are grouped together in
  7. Higher current =
  8. First discovered magnet by ancient Greeks
  9. north
  10. A charge moving through a magnetic field follows a
  11. a region composed of a group of atoms whose magnetic fields are aligned in the same direction
  12. Current in a wire causes
  13. Force into the page
  14. Magnets can polarize non-magnetic materials - making a
  15. ____ points in direction of current flow (first hand rule)
  16. field lines drawn from
  17. Drawn from N to S
  18. Middle finger/palm (Third Right Hand Rule)
  19. A magnetic with a greater flux value is ______ than one with a lower flux value
  20. magnets are _____ they have two opposite ends, North and South
  21. magnetic field (T)
  22. exist around the ends of a magnet
  23. length of wire (m)
  24. Uses the force from the magnetic field produced by current in wire to move a needle for reading I or V
  25. Used to determine the direction of a magnetic field
  26. Used to determine the force on a current-carrying wire in a magnetic field (β)
  27. magnetic field (T, tesla)
  28. Thumb (Third Right Hand Rule)
  29. Center of soleniod makes a _____, like that of a temporary magnet
  30. The magnet created by this flow is called an
  31. Helps define the strength of a magnetic field - number of field lines in a particular area around a magnetic
  32. thumb shows____ (Second Right-Hand Rule)
  33. A metal rod placed inside the coil will become
  34. Coil of wire with many loops
  35. Forces on Currents in a Magnetic Field are all ____ to each other
  36. Like electric charge, magnetic forces can work at a
  37. _____ domains are randomly arranged
  38. ϕM = Aβcosθ
  39. number of field lines per unit area and denotes field strength
  40. Magnetic fields create
  41. The geographic north pole of Earth is actually a
  42. Wires can then be
  43. gun positioning
  44. thumb does the ____ and fingers do the ____ (Second Right-Hand Rule)
  45. The compass needle pointed_____ to the wire's current flow
  46. a region where a magnetic force can be detected
  47. 1820, _______ discovered that current in a wire moves a compass needle
  48. magnetic strength of the earth
  49. represents magnetic flux
  50. current (A)
  51. fingers show _____(Second Right-Hand Rule)
  52. Determines the direction of a magnetic field created by a solenoid
  53. Index finger (Third Right Hand Rule)
  54. area of material generating magnetic field
  55. thumb does the ____ and fingers do the____ (first hand rule)
  56. velocity of the charge (m/s)
  57. charge (C)
  58. Many permanent magnets are made of a combination of
  59. Measures small current
  60. Each electron in a magnet acts like a
  61. _____ don't exist
  62. Force out of the page
  63. are created from other magnets - its atomic structure makes it "hold" its magnetism
  64. a coil of wire with an electric current in it
  65. south
  66. _____ indicates magnetic field direction(first hand rule)
  67. Only for positive charges
  68. Increasing loops =
  69. Unlike poles