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






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






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






4. 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.






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






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






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






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






9. 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.






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






11. One million ohms.






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






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






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






16. 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.






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






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






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. One- thousandth of volt.






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






22. A measuring device.






23. One- thousandth of a ampere






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






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






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






27. 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.






28. An instrument for measuring electric current






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






45. The unit of resistance. It is the resistance through which a voltage of 1 volt will produce a current of 1 ampere.






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






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






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






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. 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.