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






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






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






4. Negative charge of electricity






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






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






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






8. A unit of power.






9. Total and complete opposition to the flow of electrons






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






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






12. The unit of Electro- Motive Force






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






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






15. 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.






16. A measuring device.






17. The magnetism which a material retains after the magnetic force which magnetized it has been removed.






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






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






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






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






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






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






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






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






26. Opposition to current flow






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






28. The rotating member of an electrical machine.






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






30. 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.






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






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






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






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






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






36. 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.






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






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






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






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






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






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






43. 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.






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


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






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


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






48. One millionth of a volt.






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






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