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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. Negative charge of electricity






2. The rotating member of an electrical machine.






3. Any device which may be placed in the circuit and which offers opposition to the flow of electrons around the circuit.






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






5. A unit of power.






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






7. An instrument for measuring electric current






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






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






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






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






12. 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.






13. 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.






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






15. 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)






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






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






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






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






20. Opposition to current flow






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






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






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






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






25. 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.






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






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






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






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






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






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






32. One millionth of a volt.






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






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






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






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






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






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






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






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






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






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






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






44. One millionth of an ampere.






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






46. 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






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






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






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






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