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






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






3. 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.






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






5. An instrument for measuring electric current






6. 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.






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






8. One millionth of a volt.






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

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






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






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






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






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






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






16. 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.






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






18. 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.






19. One- thousandth of a ampere






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






21. 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.






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






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






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






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






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






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






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






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






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






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






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






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






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






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






37. A generator that produces alternating current.






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






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






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






41. 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.






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






43. A measuring device.






44. One million ohms.






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






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






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






48. A circuit carrying three alternating currents whose cycles begin one after another. 120 electrical degrees apart.






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






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