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






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






4. 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.






5. 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






6. A material which CANNOT be magnetized. Example: Wood - Glass - Brass - Rubber...






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






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






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






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






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






12. The unit of Electro- Motive Force






13. 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.






14. Negative charge of electricity






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

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






17. 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.






18. 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.






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






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






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






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






23. 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.






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






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






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






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

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28. 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.






29. The rotating member of an electrical machine.






30. One million ohms.






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






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






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






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






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






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






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






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






39. A unit of power.






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






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






42. One millionth of an ohm.






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






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






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






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






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






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






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






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