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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 unit of POWER. 1 kilowatt = 1 -000 watts






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






3. 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.






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






5. One millionth of an ohm.






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






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






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






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






10. One million ohms.






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






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






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






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






15. 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.






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






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






18. Any device which may be placed in the circuit and which offers opposition to the flow of electrons around the circuit.






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






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






21. 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.






22. A measuring device.






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






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






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






26. 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






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






28. Opposition to current flow






29. 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.






30. One millionth of a volt.






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






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






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






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






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






36. The unit of Electro- Motive Force






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






38. A device used to change the voltage of an alternating current circuit.






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






40. An instrument for measuring electric current






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






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






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






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






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






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






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






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






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