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






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






3. A generator that produces alternating current.






4. A cell which is composed of certain materials which are used up during the process of delivering electric current.






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






20. 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.






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






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






23. One millionth of an ohm.






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






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






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






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






28. Negative charge of electricity






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






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






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






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






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






35. One- thousandth of a ampere






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






37. Opposition to current flow






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






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






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

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41. A measuring device.






42. 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.






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






44. The time rate at which work is done or energy is transferred. When a pressure of 1 volt sends a current of 1 ampere through a resistance of 1 ohm - the power in the circuit is said to be 1 watt.






45. One million ohms.






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






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






48. An instrument for measuring electric current






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






50. One- thousandth of volt.