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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. 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)






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






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






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






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






6. One millionth of an ampere.






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






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






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






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






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






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






13. A measuring device.






14. Opposition to current flow






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

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






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






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






19. 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.






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






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






22. One millionth of a volt.






23. One- thousandth of volt.






24. The rotating member of an electrical machine.






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






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






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






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






29. 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.






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






31. 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.






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






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






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






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






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






37. 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.






38. One- thousandth of a ampere






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






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






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






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






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






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






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






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






47. A unit of power.






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






49. 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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50. A generator that produces alternating current.