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






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






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






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






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






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






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






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






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






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






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






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






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






14. The unit of Electro- Motive Force






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






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






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






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






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






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






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






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






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

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






25. One million ohms.






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






27. One millionth of an ampere.






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






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






30. 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






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

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






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






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






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






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






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






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






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






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






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






42. 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.






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






44. 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.






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






46. An instrument for measuring electric current






47. 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)






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






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






50. 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.