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42 True/False questions

  1. lodestoneMagnetizing an object by bringing it into the presence of an existing magnet is called magnetization by _____.

          

  2. south (south-seeking) poleterm for the end of a lodestone that gains a southward direction

          

  3. left-hand rulethe rule that states that if the thumb of the right hand is pointed along a conductor in the direction of positive current, the fingers encircle the conductor in the direction of the north-moving field

          

  4. lines of fluxterm for lines on diagrams or drawings that show which ways the north and south poles point

          

  5. orbital magnetsterm for an electron that rotates on its own axis

          

  6. closed loopsterm used for any piece of magnetized rock since it had value in giving direction

          

  7. contactMagnetizing an object by stroking or touching it with an existing magnet is called magnetization by ____.

          

  8. magnetic inductionterm for the field strength at a particular point in a magnetic field

          

  9. Hans OerstedDanish physicist who found that an electric current affects the magnetic meedle of a compass

          

  10. magnetic fluxterm for when an electron seems to spin but does not actually spin

          

  11. strongerTrue or False: Electrons flow from negative to postive.

          

  12. permeabilityThe extent to which a material absorbs lines of flux is related to its _____, or how strongly it is magnetized by a magnetic field.

          

  13. ferromagneticterm for a material that has only one unpaired elctron per atom, and is weakly attracted to a magnet

          

  14. alnicoterm for an alloy of aluminum, nickel, cobalt, and iron in various proportions, of which many permanent magnets are made

          

  15. magnetic insulatorsterm for highly permeable materials that resist penetration by lines of flux

          

  16. electromagnetterm for a material that is strongly attracted to a magnet because it has two or more unpaired electrons per atom

          

  17. right-handed three finger rulethe rule that states that if you point your right thumb in the direction of positive current, your extended index finger points in the direction of magnetic induction

          

  18. diamagneticterm for a material that is repelled by a magnet

          

  19. ampereterm for a piece of soft iron that can be placed across the poles at the end of each pair of magnets when they are put away

          

  20. keeperterm for a piece of soft iron that can be placed across the poles at the end of each pair of magnets when they are put away

          

  21. saturationterm for the spin axes of all the unpaired electrons pointing in the same direction

          

  22. temporary magnetsterm for iron magnets and other easily demagnetized magnets

          

  23. north (north-seeking) poleterm for the end of a lodestone that gains a north-ward direction

          

  24. law of magnetic polesthe law that states that unlike poles attract whereas like poles repel

          

  25. conventional currentterm that describes electricity through a circuit as positive charges flowing from positive to negative

          

  26. inductionterm for the spin axes of all the unpaired electrons pointing in the same direction

          

  27. 1.26 x 10^-6 N/A^2another term for magnetic induction

          

  28. spin magnetterm for a material that is repelled by a magnet

          

  29. magnetiteterm for a material that is repelled by a magnet

          

  30. domainterm for a small region containing billions or trillions of atoms with aligned magnetic poles

          

  31. coulombterm for the amount of charge that, in each second, passes a given point on the conductor

          

  32. dipolarA magnetic pole is always paired with its opposite; thus, every magnet is ____.

          

  33. contact and inductiontwo ways to magnetize an object

          

  34. right-hand rulethe rule that states that if the thumb of the right hand is pointed along a conductor in the direction of positive current, the fingers encircle the conductor in the direction of the north-moving field

          

  35. permalloyThe extent to which a material absorbs lines of flux is related to its _____, or how strongly it is magnetized by a magnetic field.

          

  36. paramagneticterm for a material that is repelled by a magnet

          

  37. tangentTrue or False: Electrons flow from negative to postive.

          

  38. solenoidterm for an alloy of aluminum, nickel, cobalt, and iron in various proportions, of which many permanent magnets are made

          

  39. monopolesterm for isolated north poles and south poles that might occur somewhere in nature

          

  40. magnetic momentterm for the total number of lines falling on any surface, or the total magnetic influence playing oupon a surface

          

  41. Trueterm for a piece of soft iron that can be placed across the poles at the end of each pair of magnets when they are put away

          

  42. flux densityThe direction of field strength acting on an isolated north pole is _____ to a line of flux at every point.