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






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






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






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






5. A unit of power.






6. An instrument for measuring electric current






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






8. One millionth of an ampere.






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






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






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






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






14. That property of a material which determines how readily it conducts magnetic lines of flux. Opposite magnetic quality or conductivity.






15. One millionth of an ohm.






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






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






18. 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.






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






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






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






22. Opposition to current flow






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






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






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






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






27. 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.






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






29. One million ohms.






30. Negative charge of electricity






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






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






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






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






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






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






37. 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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38. A rate of movement of electrons through a conductor.






39. The rotating member of an electrical machine.






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






41. Rate of electrons flow (current flow). When one 'Coulomb' of electrons pass a given point in one second.






42. A measuring device.






43. 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)






44. One millionth of a volt.






45. One- thousandth of volt.






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






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






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






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






50. 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.







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