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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. A cell which is rechargeable. Uses materials which change in compostition during delivery of current - but may be restored to original condition upon recharge.






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

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






4. A machine which utilizes magnetism to produce an EMF and consequently - an electric circuit.






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. The path of an electric current. To permit a steady flow of current - the path must be complete. Commonly - a complete circuit includes a device for the production of an electromotive force - connecting wires - and a device supplied with electricity.






7. An instrument for measuring electric current






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






9. Meter used to measure resistance in an electrical circuit.






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






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






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






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






14. The unit of resistance. It is the resistance through which a voltage of 1 volt will produce a current of 1 ampere.






15. Total and complete opposition to the flow of electrons






16. Opposition to current flow






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

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18. One millionth of a volt.






19. Occurs when a stream of electrons are caused to move through a conductor.






20. 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.






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






23. One- thousandth of a ampere






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






25. A cell which is composed of certain materials which are used up during the process of delivering electric current.






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






27. A current limiting device designed to melt and break the circuit when a specified current is exceeded. (The weakest point in a circuit)






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






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






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






31. A unit of work or ENERGY. 1 kilowatt hour = 1 -000 watt hours






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






33. The rotating member of an electrical machine.






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






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






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






37. A very low resistance path placed in a circuit in such a manner as to allow an excessive current flow.






38. 1.Material itself (Atomic Structure - Good conductor or Bad) 2.Length of the conductor 3.Cross - sectional area (Size) 4.Temperature






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






40. An alternating current which current cycle begins earlier than its voltage cycle.






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






42. (Lode Stone) Certain type of mineral ore which has the natural Properties of a magnet.






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






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






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






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






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






48. A material that has many free electrons thus allowing electric current to flow through it easily.






49. One millionth of an ampere.






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