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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 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)






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






3. 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






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






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






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






7. 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.






8. A generator that produces alternating current.






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






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






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






12. 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.






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






14. Total and complete opposition to the flow of electrons






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






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






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






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






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






20. A measuring device.






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






22. 1.Material itself (Atomic Structure - Good conductor or Bad) 2.Length of the conductor 3.Cross - sectional area (Size) 4.Temperature






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






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






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






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






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






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






29. A unit of power.






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






31. 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.






32. 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.






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






34. One- thousandth of a ampere






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






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






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






38. One millionth of an ohm.






39. The path of an electric current. To permit a steady flow of current - the path must be complete. Commonly - a complete circuit includes a device for the production of an electromotive force - connecting wires - and a device supplied with electricity.






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






41. 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.






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






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






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






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






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






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






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






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






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