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






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






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






4. Certain quantity of electrons. The unit of measure that specifies the rate at which electric current flows per second.






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






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






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






8. A circuit in which there is resistance (load) connected both in series and parallel.






9. The magnetism which a material retains after the magnetic force which magnetized it has been removed.






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






11. Shows relationship between Current - Voltage - Wattage and Resistance.

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12. 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.






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






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






15. 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.






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






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






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






19. A generator that produces alternating current.






20. The unit of Electro- Motive Force






21. Opposition to current flow






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






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






24. 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.






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






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






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






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






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






30. Hardened steel which has been magnetized artificially and which retains its magnetic properties






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






32. A measuring device.






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






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






35. An instrument for measuring electric current






36. 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)






37. One- thousandth of a ampere






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






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






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






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






42. The rotating member of an electrical machine.






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






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






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






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






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






48. 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






49. 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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50. A unit of POWER. 1 kilowatt = 1 -000 watts







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