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






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






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






4. One millionth of an ohm.






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

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






7. One million ohms.






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






9. The rotating member of an electrical machine.






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






11. 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.






12. 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






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






14. One- thousandth of a ampere






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






17. The path of an electric current. To permit a steady flow of current - the path must be complete. Commonly - a complete circuit includes a device for the production of an electromotive force - connecting wires - and a device supplied with electricity.






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






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






20. 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.






21. Negative charge of electricity






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






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






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






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






26. One millionth of a volt.






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






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






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






30. The unit of Electro- Motive Force






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






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






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






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






35. A unit of power.






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






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






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






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






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






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






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






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






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






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






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






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






49. 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.






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






Can you answer 50 questions in 15 minutes?



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