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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 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.






2. Opposition to current flow






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






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






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






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






7. One- thousandth of volt.






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






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






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






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






12. One- thousandth of a ampere






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






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






15. 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.






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






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






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






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






20. 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.






21. The rotating member of an electrical machine.






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






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






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






25. A measuring device.






26. One million ohms.






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






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






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


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






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






32. Total and complete opposition to the flow of electrons






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






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






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






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






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






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






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






40. 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.






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


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






43. A unit of power.






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






45. The property of a material that opposes the flow of current.






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






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






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






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






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