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






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






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






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






5. One million ohms.






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. Negative charge of electricity






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






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






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






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






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






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






14. One- thousandth of a ampere






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






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






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






18. Total and complete opposition to the flow of electrons






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






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






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






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






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






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






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






26. 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.






27. Fundamental constituents of matter. The 'elements' (tiny particles) which come together in various combinations to form molecules of many substances.






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






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






30. Certain quantity of electrons. The unit of measure that specifies the rate at which electric current flows per second.






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






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






33. 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)






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






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


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






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


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






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






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






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






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






43. An instrument for measuring electric current






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






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






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






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






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






49. One millionth of an ohm.






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