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






2. 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.






3. A circuit with two or more paths for the current to take.






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






5. The number of cycles per second. Example: 60 cycles per second alternating current.






6. Total and complete opposition to the flow of electrons






7. Lines representing the direction of the magnetic force in a magnetic field.






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






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






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






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






13. 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.






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






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






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






17. 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.






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

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






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






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






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






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






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






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






27. Opposition to current flow






28. A device which capacity is its chief electrical property; a device for storing or holding an electric charge; a capacitor.






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






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

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






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






33. An instrument for measuring electric current






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






35. One millionth of a volt.






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






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






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






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






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






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






42. 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.






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






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






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






46. A unit of power.






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






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






49. One- thousandth of volt.






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