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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 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.






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






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






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






5. 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






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






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






8. One millionth of an ohm.






9. Opposition to current flow






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






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






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






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






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






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






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






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






18. An instrument for measuring electric current






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






20. 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.






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






22. 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.






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






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






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






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






27. One millionth of an ampere.






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






29. One million ohms.






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






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






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






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






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






35. The area surrounding a magnet in which magnetic properties are exhibited






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






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






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






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

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40. One- thousandth of volt.






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






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






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






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






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






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






47. 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.






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






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






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