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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. Negative charge of electricity






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






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






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






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






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






9. A measuring device.






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






11. A unit of power.






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






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






14. 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






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






16. Transformer coil connected to the load. (Output side of a transformer regardless of voltage).






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






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






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






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






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

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22. The part of the magnet where the magnetic force is most concentrated. Commonly referred to as the North or South pole or the positive or negative poles)






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






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






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






26. One- thousandth of volt.






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






28. Total and complete opposition to the flow of electrons






29. A rod or strip composed of two metals having different rates or coefficients of expansion. Upon being heated - it bends in a direction which causes the material with the greater rate of expansion to be on the outside.






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






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






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

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






34. A generator that produces alternating current.






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






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






37. 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.






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






39. Any of the spaces occupied by the orbits of a group of electrons of approximately equal energy surronding the nucleus of an atom.






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






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






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






43. The rotating member of an electrical machine.






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






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






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






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






48. 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.






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






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