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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 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.






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






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






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






5. One- thousandth of a ampere






6. 1.Material itself (Atomic Structure - Good conductor or Bad) 2.Length of the conductor 3.Cross - sectional area (Size) 4.Temperature






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






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






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

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10. The unit of Electro- Motive Force






11. One millionth of an ampere.






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






13. 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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14. 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.






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






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






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






18. The rotating member of an electrical machine.






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






20. A rate of movement of electrons through a conductor.






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






22. 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.






23. One million ohms.






24. A complete path provided for the flow of electrons. Consists of a source - with a closed conducting path leading from the source and back to the source






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






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






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






28. One millionth of an ohm.






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






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






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






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






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






34. One- thousandth of volt.






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






36. The dissimilar metals which are placed in an electrolyte to form a cell.






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






38. 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.






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






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






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






42. A unit of power.






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






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






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






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

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






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






49. Negative charge of electricity






50. A generator that produces alternating current.