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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. One million ohms.






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






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






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






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






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






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






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






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






10. 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.






11. One millionth of a volt.






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






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






14. One millionth of an ohm.






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






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






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






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






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






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






21. One- thousandth of a ampere






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






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






24. Opposition to current flow






25. 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.






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






27. 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.






28. A generator that produces alternating current.






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






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






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






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






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






34. 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.






35. An instrument for measuring electric current






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






37. 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.






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






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






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






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






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






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






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






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






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






47. 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.






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






49. 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)






50. The rotating member of an electrical machine.