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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. 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.






3. One million ohms.






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






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






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






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






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






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






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






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






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






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






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






15. An instrument for measuring electric current






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






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






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

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






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






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






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






23. An instrument for measuring electrical power. Most common use: The meter of your house to measure electrical consumption.






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






25. The rotating member of an electrical machine.






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






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






29. The unit of Electro- Motive Force






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






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






32. A resistor designed so that its resistance is readily adjusted.






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






34. 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.






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






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






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






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






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






41. A generator that produces alternating current.






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






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






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






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






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






47. 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)






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






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






50. One millionth of a volt.