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






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






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






4. 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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5. 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.






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






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






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






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






10. 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.






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






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 rate of movement of electrons through a conductor.






14. An instrument for measuring electric current






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






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

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17. A material which can be magnetized - principally iron.






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






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






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






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






22. One- thousandth of a ampere






23. A generator that produces alternating current.






24. One millionth of an ohm.






25. 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.






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






27. One millionth of an ampere.






28. Negative charge of electricity






29. 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.






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






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






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






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






34. A current which reverses in direction at regularly recurring intervals - the total flow in one direction being equal to that in the other direction.






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






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






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






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






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






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






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






42. One millionth of a volt.






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






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






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






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






47. 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.






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






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






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