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






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






3. One millionth of an ampere.






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






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






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






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






8. 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.






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






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






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






12. A unit of power; equal to 550 foot- pounds per second of approximately 746 watts.






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






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






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






16. A measuring device.






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






18. A circuit with only one path for current to flow. There are no branches.






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






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






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






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






23. The opposite ends of a magnet where the magnetism is concentrated. Each magnet has two poles - designated as north and south.






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






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






26. 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.






27. One million ohms.






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






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






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






31. 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.






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






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






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






35. One- thousandth of a ampere






36. 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.






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






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






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






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






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






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






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






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






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






46. Opposition to current flow






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






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






49. 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.






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