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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 property of a material that opposes the flow of current.






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






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






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






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






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






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






8. A unit of power.






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






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






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






12. One millionth of an ampere.






13. The rotating member of an electrical machine.






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






16. A device which capacity is its chief electrical property; a device for storing or holding an electric charge; a capacitor.






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






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

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






20. 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






21. 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.






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






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






24. 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.






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






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






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






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






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






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






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






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






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






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






35. 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.






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






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






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






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






40. One- thousandth of volt.






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






42. One million ohms.






43. 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.






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






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






46. One millionth of an ohm.






47. Opposition to current flow






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






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






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