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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 circuit with more than one path. Current branches to flow in every available path.






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






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






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






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






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






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






9. 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.






10. A measuring device.






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






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






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






14. 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.






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






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






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






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






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






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

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






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






23. The rotating member of an electrical machine.






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






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






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






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






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






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






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






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






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






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






34. 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.






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






36. Opposition to current flow






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






39. The process of producing an electromotive force in a conductor as a result of the cutting of magnetic lines of force by a conductor.






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






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






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






43. A unit of power.






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






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






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






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






48. A machine which utilizes magnetism to produce an EMF and consequently - an electric circuit.






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






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







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