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Test your basic knowledge |

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. One millionth of an ohm.






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






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






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






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






6. Term applied to the loss of voltage in forcing current through any portion of a circuit. Different factors will cause a drop; material - size - (cross - sectional area) length - temperature.






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






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






9. The unit of Electro- Motive Force






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






11. 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.






12. 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.






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






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






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






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


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






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






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






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






21. An instrument for measuring electric current






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






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






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






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






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






27. One- thousandth of a ampere






28. One millionth of a volt.






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






30. Those electrons in orbits farthest out from the nucleus - loosely bound and migrate from one atom to another.






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






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






33. 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.






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






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






36. 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.






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






38. 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.






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






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






41. 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.


42. Opposition to current flow






43. Total and complete opposition to the flow of electrons






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






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






47. The rotating member of an electrical machine.






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






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






50. One- thousandth of volt.






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