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






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






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






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






5. 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.






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

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






8. The unit of Electro- Motive Force






9. 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.






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






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






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






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






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






15. Positive charge of electricity. Located in the nucleus of the atom.






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






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






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






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






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






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






22. One million ohms.






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






24. 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.






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






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






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






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






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






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






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






32. One millionth of an ampere.






33. 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.






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






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






36. A measuring device.






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






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






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






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






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






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






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






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






45. An instrument for measuring electric current






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






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






48. 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.






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






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