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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; equal to 550 foot- pounds per second of approximately 746 watts.






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






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






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






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






6. 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.






7. The rotating member of an electrical machine.






8. 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.






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






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






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






12. An instrument for measuring electric current






13. The unit of Electro- Motive Force






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






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






16. 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.






17. 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.






18. 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.






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






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

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






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






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






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






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






26. One millionth of an ampere.






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






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






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






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






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






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






33. Negative charge of electricity






34. One millionth of an ohm.






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






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






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






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






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






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






41. Total and complete opposition to the flow of electrons






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






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






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






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






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






47. 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.






48. An instrument for measuring electromotive force in volts. It must be connected across the load that causes the votage drop.






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






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