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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 rate of movement of electrons through a conductor.






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

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3. One- thousandth of a ampere






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






5. 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.






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






7. (EMF) The force created by an electric generator (or by other means) which causes current to flow. (Same as Voltage - Volts - Electric Potential - Pressure).






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






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

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






11. 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.






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






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






14. A material which can be magnetized - principally iron.






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






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






17. An instrument for measuring electric current






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






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






20. One million ohms.






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






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






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






24. A measuring device.






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






26. 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.






27. One- thousandth of volt.






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






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






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






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






32. 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






33. 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)






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






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






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






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






38. Opposition to current flow






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






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






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






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






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






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






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






46. Negative charge of electricity






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






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






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






50. 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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