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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 measuring device.






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






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






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






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






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






7. Negative charge of electricity






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






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






10. Single NEGATIVE electrical charge. Orbits around the nucleus some in paths close to the nucleus - others in paths varying distance from the nucleus.






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






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






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






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






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






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






17. A unit of power.






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






19. A coil of wire designed to act as a magnet as a result of carrying an electrical current. It is usually wound on a soft iron core.






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






21. Total and complete opposition to the flow of electrons






22. One- thousandth of a ampere






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






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






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






26. 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.






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






28. 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.






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

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






31. One millionth of an ampere.






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






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






34. An instrument for measuring electric current






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






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






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






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






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






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






41. 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.






42. 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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43. Any device which may be placed in the circuit and which offers opposition to the flow of electrons around the circuit.






44. 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






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






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






47. One- thousandth of volt.






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






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






50. 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)







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