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






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






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






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






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






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






7. 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.






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






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






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






11. One millionth of a volt.






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






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






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






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






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






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






18. An instrument for measuring electric current






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






20. 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.






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






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






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






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

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25. 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






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






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






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






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






30. A measuring device.






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






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






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






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






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






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






37. 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.






38. 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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39. 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.






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






41. 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.






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






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






44. One- thousandth of volt.






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






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






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






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






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






50. A generator that produces alternating current.






Can you answer 50 questions in 15 minutes?



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