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53 True/False questions

  1. magnetic fieldterm for the quanity of flux linking a conducting loop

          

  2. electromagnetic inductionlaw that says that a change in magnetic flux specifically induces potential difference, which instantaneously produces a current

          

  3. commutatorterm for a stationary armature in a DC generator

          

  4. alternating current (AC)term for current that changes direction

          

  5. strengthThe ___ of relative motion between a coil and a magnetic field determines how much current is prodced.

          

  6. electrochemical cellterm for a device that produces electrical current through a chemical reaction

          

  7. statorterm for a stationary armature in a DC generator

          

  8. FalseTrue or False: The mere presence of a magnetic field is enough to induce current within a coil.

          

  9. salt bridgeterm for the rings which rotate with the armature to allow constant contact betwee the armature and the brushes

          

  10. aqueous solutionterm for an ionic solid dissolved in water

          

  11. torqueterm for the perpendicular distance (r) from the axis of rotation to the line of the force

          

  12. loadterm for an appliance that uses a current's energy to do some type of work

          

  13. the magnetic flux is changing.When a single conducting loop or segment thereof is passing through a magnetic field, current is generated in the loop if and only if...

          

  14. motorterm for a magnet that rotates inside the stator

          

  15. thermoelectric, temperatureterm for any device consisting of a thermocouple lodged within an apparatus that provides for the heating of one junction and the cooling of the other

          

  16. seriesIf the cells in a battery are connected so that the anode of one cell is connected to the cathode of the next and so on down the line, the cells are connected in ___.

          

  17. law of inductionlaw that says that a change in magnetic flux specifically induces potential difference, which instantaneously produces a current

          

  18. torque armSince each force is exerted at a distance from the axis of rotation, each produces a(n) ___.

          

  19. armatureterm for a meter used to measure small amounts of current

          

  20. Lenz's lawthe law that states that the current induced by a change in magnetic flux is directed so as to create a magnetic field that opposes the change

          

  21. current-generating capacity, smallestterm for current that changes direction

          

  22. Peltier effectterm for the appearance of the Seebeck voltage in an appropriate coupling of two conductors

          

  23. two-pole motorterm for the source of mechanical energy that drives a generator

          

  24. opposingAccording to Lenz's law, when the flux passing upward through the second coil increases, the induced current must create a(n) ____ magnetic field.

          

  25. batteryTrue or False: The mere presence of a magnetic field is enough to induce current within a coil.

          

  26. their individual voltagesterm for a complete circuit in which two conductors made of different materials come together at junctions maintained at different temperatures

          

  27. rotorterm for a freely rotating loop mounted in a magnetic field and fed with current that reverses periodically

          

  28. number of turnsCurrent varies directly with the ___ __ ___ in a coil.

          

  29. prime moverterm for a meter used to measure small amounts of current

          

  30. thermocoupleSince each force is exerted at a distance from the axis of rotation, each produces a(n) ___.

          

  31. electrodesterm for an aqueous solution in which electrodes are submerged

          

  32. direct current (DC)term for tiny currents that produce small magnetic fields working against the rotating armature in a motor

          

  33. cathodeterm for the positive electrode, which draws electrons from the conducting wire

          

  34. brushesIf the cells in a battery are connected so that the anode of one cell is connected to the cathode of the next and so on down the line, the cells are connected in ___.

          

  35. electric generatorterm for any device consisting of a thermocouple lodged within an apparatus that provides for the heating of one junction and the cooling of the other

          

  36. anodeterm for the positive electrode, which draws electrons from the conducting wire

          

  37. Michael Faradayterm for two strips that are immersed in an aqueous solution

          

  38. opposesInduced current is directed so as to create a magnetic field that ____ the motion causing the current.

          

  39. eddy currentsterm for the rings which rotate with the armature to allow constant contact betwee the armature and the brushes

          

  40. right-handed three finger rulethe rule that says if the thumb points in the direction of the charge's motion, the index finger points in the direction of magnetic induction and the bent middle finger points in the direction of magnetic force

          

  41. hysteresisThe ___ of relative motion between a coil and a magnetic field determines how much current is prodced.

          

  42. magnetic fluxterm for the quanity of flux linking a conducting loop

          

  43. Seebeck voltageterm for a potential difference between junctions

          

  44. slip ringsterm for the rings which rotate with the armature to allow constant contact betwee the armature and the brushes

          

  45. speedThe ___ of relative motion between a coil and a magnetic field determines how much current is prodced.

          

  46. thermoelectric generatorterm for a device that produces current by electromagnetic induction

          

  47. any individual cell's voltageThe voltage of cells connected in series is the sum of ___ ____ ____.

          

  48. parallelIn a ____ combination of cells, all the anodes are connected and all the cathodes are connected.

          

  49. three-phase currentterm for current composed of three currents phased 120 degrees apart

          

  50. electrolyteterm for an aqueous solution in which electrodes are submerged

          

  51. Seebeck effectterm for the heating or cooling of a junction between two dissimilar conductors in the pathway of current

          

  52. similarterm for a meter used to measure small amounts of current

          

  53. ammeterterm for a meter used to measure small amounts of current