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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 property of a material that opposes the flow of current.






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. 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.






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






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






6. Opposition to current flow






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






8. 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.






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






10. One millionth of a volt.






11. 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.






12. 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.






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






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






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






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






17. 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.






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






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






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






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






22. Negative charge of electricity






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






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






25. A generator that produces alternating current.






26. 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.






27. A measuring device.






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






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






30. One millionth of an ampere.






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






33. The rotating member of an electrical machine.






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






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






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






37. 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






38. A coil of wire designed to act as a magnet as a result of carrying an electrical current. It is usually wound on a soft iron core.






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






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






41. One million ohms.






42. One- thousandth of volt.






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






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






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






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

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47. Total and complete opposition to the flow of electrons






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






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






50. 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.