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Basic Electricity Vocab

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Shows relationship between Current - Voltage - Wattage and Resistance.

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2. The voltage dissipation between any two points in a circuit. The voltage 'dropped' or 'dissipated' in forcing current through a resistance.






3. Total and complete opposition to the flow of electrons






4. The rotating member of an electrical machine.






5. A single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of an atom.






6. Electric charges at rest. Caused by friction of materials - where a surplus of electrons exists and may be discharged.






7. An alternating current which current cycle begins later that its voltage cycle.






8. Opposition to current flow






9. That property of a material which determines how readily it conducts magnetic lines of flux. Opposite magnetic quality or conductivity.






10. Coil connected to the source of power on a transformer.






11. In a battery - the electrode which takes up the electrons returning from the external circuit.






12. The unit of electromotive force - potential - pressure - or voltage which produces a current of one ampere in a circuit having a resistance of 1 ohm. This is the force created to move electrons through a circuit.






13. An instrument for measuring electromotive force in volts. It must be connected across the load that causes the votage drop.






14. A resistor designed so that its resistance is readily adjusted.






15. A complete sequence of events - as an alternating- current cycle.






16. The liquid solution (sometime a paste) in which the electrodes are placed.






17. A transformer designed to raise the voltage of an alternating current. Most common use; In a generating plant to raise the voltage.






18. The space around a magnet in which the magnetic force is felt.






19. 1.Speed of conductors cutting lines of force 2.Strength of the magnetic field 3.Length of conductors cutting through the field






20. A unit of power.






21. One millionth of an ohm.






22. A short circuit between two energized conductors and/or an energized conductor and a grounded phase. Very high current flow.

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23. A certain force exhibited by some materials which give them the ability to attract other materials. Principally iron or its alloys.






24. One millionth of an ampere.






25. A device which capacity is its chief electrical property; a device for storing or holding an electric charge; a capacitor.






26. Invisible lines along which magnetic energy travels from one pole of a magnet to the other.






27. The difference between the electrical condition of one point in an electric circuit and that of another point which tends to cause current to flow between two points. Measured in volts.






28. The opposite ends of a magnet where the magnetism is concentrated. Each magnet has two poles - designated as north and south.






29. A measuring device.






30. One- thousandth of a ampere






31. The electrodes of a cell shaped as plates to expose a surface as possible to the electrolyte.






32. Hardened steel which has been magnetized artificially and which retains its magnetic properties






33. A rate of movement of electrons through a conductor.






34. One- thousandth of volt.






35. A transformer designed to lower voltage of an alternating current. Most common type of transformer used on a power system.






36. The center portion of an atom which has a positive electrical charge.






37. A unit of power; equal to 550 foot- pounds per second of approximately 746 watts.






38. A circuit in which there is resistance (load) connected both in series and parallel.






39. One millionth of a volt.






40. One million ohms.






41. A material with few free electrons. A structure or material used to prevent the passage of current.






42. The dissimilar metals which are placed in an electrolyte to form a cell.






43. An instrument for measuring electric current






44. Those electrons in orbit nearest the nucleus - not easily dislodged from their normal orbits.






45. (EMF) The force created by an electric generator (or by other means) which causes current to flow. (Same as Voltage - Volts - Electric Potential - Pressure).






46. The complete path through which the lines of force travel - leaving the north pole and re- entering the south pole.






47. An instrument for measuring electrical power. Most common use: The meter of your house to measure electrical consumption.






48. A circuit with two or more paths for the current to take.






49. A connection of circuit of low resistance. Current through each of the end- to- end devices is exactly the same. Only one path for the current.






50. Those electrons in orbits farthest out from the nucleus - loosely bound and migrate from one atom to another.