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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 unit of power.






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






3. 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.






4. 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.






5. One millionth of an ampere.






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






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






8. The liquid solution (sometime a paste) in which the electrodes are placed.






9. 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)






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






11. Several secondary cells connected together for either a greater voltage or current output.






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






13. The rotating member of an electrical machine.






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






15. Total and complete opposition to the flow of electrons






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






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






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






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






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






21. 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.






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






41. A single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of an atom.






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






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






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






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






46. The condition where the free electrons are caused to move in the same direction along or through a conductor.






47. 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






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






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

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







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