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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. 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.






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






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






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






6. One- thousandth of volt.






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






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






9. 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.


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






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






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






13. The rotating member of an electrical machine.






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






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






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






17. Negative charge of electricity






18. Any of the spaces occupied by the orbits of a group of electrons of approximately equal energy surronding the nucleus of an atom.






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






20. 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.






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






22. 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.






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






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






25. One million ohms.






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






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






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






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






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






31. Opposition to current flow






32. A unit of POWER. 1 kilowatt = 1 -000 watts






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






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






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






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






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






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






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






40. Total and complete opposition to the flow of electrons






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






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






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






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






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






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






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






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






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






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