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






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






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






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






5. In a battery - the electrode which takes up the electrons returning from the external circuit.






6. 1.Speed of conductors cutting lines of force 2.Strength of the magnetic field 3.Length of conductors cutting through the field






7. 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.






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






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






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






11. A generator that produces alternating current.






12. The unit of Electro- Motive Force






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






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






15. Negative charge of electricity






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






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






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






19. 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.






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






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






22. One millionth of an ampere.






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






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






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






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






27. 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.






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






29. 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.


30. One millionth of a volt.






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






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






33. One million ohms.






34. The part of the magnet where the magnetic force is most concentrated. Commonly referred to as the North or South pole or the positive or negative poles)






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






36. 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.






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






38. 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.






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






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






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






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






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






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






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






46. 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.






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






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






49. 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.






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






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