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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. Meter used to measure resistance in an electrical circuit.






2. The moving part of a dynamo or motor consisting of coils of wire around an iron core.






3. Lines representing the direction of the magnetic force in a magnetic field.






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






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






6. A device used to change the voltage of an alternating current circuit.






7. The number of cycles per second. Example: 60 cycles per second alternating current.






8. A material which CANNOT be magnetized. Example: Wood - Glass - Brass - Rubber...






9. A circuit with more than one path. Current branches to flow in every available path.






10. Opposition to current flow






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






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






13. A measuring device.






14. Smallest part a substance can physically divided into composed of 2 or more atoms.






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






16. The area surrounding a magnet in which magnetic properties are exhibited






17. Rate of electrons flow (current flow). When one 'Coulomb' of electrons pass a given point in one second.






18. One millionth of an ohm.






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






20. The magnetism which a material retains after the magnetic force which magnetized it has been removed.






21. Positive charge of electricity. Located in the nucleus of the atom.






22. Single POSITIVE electrical charge - located in the middle of an atom.






23. Negative charge of electricity






24. A current which reverses in direction at regularly recurring intervals - the total flow in one direction being equal to that in the other direction.






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






26. One millionth of an ampere.






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






28. A circuit carrying three alternating currents whose cycles begin one after another. 120 electrical degrees apart.






29. One- thousandth of a ampere






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






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






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






33. Iron and certain alloys of iron which are magnetized by artificial means.






34. In an electrical circuit - or part of an electric circuit - the intensity of the current is equal to the electromotive force that drives it divided by the resistance of the circuit.

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35. 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.






36. The process of producing an electromotive force in a conductor as a result of the cutting of magnetic lines of force by a conductor.






37. A complete path provided for the flow of electrons. Consists of a source - with a closed conducting path leading from the source and back to the source






38. The rotating member of an electrical machine.






39. The property of a material that opposes the flow of current.






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






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






42. A generator that produces alternating current.






43. A circuit with only one path for current to flow. There are no branches.






44. A material which can be magnetized - principally iron.






45. Shows relationship between Current - Voltage - Wattage and Resistance.

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46. An instrument for measuring electric current






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






48. A unit of POWER. 1 kilowatt = 1 -000 watts






49. Several secondary cells connected together for either a greater voltage or current output.






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