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






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






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






4. An instrument for measuring electric current






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






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






7. Opposition to current flow






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






9. A machine which utilizes magnetism to produce an EMF and consequently - an electric circuit.






10. One millionth of a volt.






11. 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.






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






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






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






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






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






17. A unit of power.






18. 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.






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






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






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






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






24. Total and complete opposition to the flow of electrons






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






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






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






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






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






30. 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)






31. 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.






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






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






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






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






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






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






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






39. 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.






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






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






42. One millionth of an ohm.






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






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






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






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






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






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






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






50. One- thousandth of a ampere