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






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






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






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






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






6. One millionth of an ohm.






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






8. Total and complete opposition to the flow of electrons






9. 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.






10. 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.






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






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






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






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






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






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






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






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






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






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






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






23. One- thousandth of volt.






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






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






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






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






28. Negative charge of electricity






29. 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






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






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






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






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






34. A measuring device.






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






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






37. Opposition to current flow






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






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






41. One- thousandth of a ampere






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






43. 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.






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






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






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






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

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






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






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