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






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






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






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






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

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6. A generator that produces alternating current.






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






8. 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.






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






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






11. The rotating member of an electrical machine.






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






13. 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.






14. A material which CANNOT be magnetized. Example: Wood - Glass - Brass - Rubber...






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






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






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






18. One millionth of a volt.






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






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






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






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






23. A current which reverses in direction at regularly recurring intervals - the total flow in one direction being equal to that in the other direction.






24. One millionth of an ampere.






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






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






27. One- thousandth of volt.






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






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






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






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






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






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






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






36. The time rate at which work is done or energy is transferred. When a pressure of 1 volt sends a current of 1 ampere through a resistance of 1 ohm - the power in the circuit is said to be 1 watt.






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






38. Opposition to current flow






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






40. One millionth of an ohm.






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






42. 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.






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






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






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






46. The complete path through which the lines of force travel - leaving the north pole and re- entering the south pole.






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






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






49. 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






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