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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. Any of the spaces occupied by the orbits of a group of electrons of approximately equal energy surronding the nucleus of an atom.






2. A unit of power.






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






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






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






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






7. In an electrical circuit - or part of an electric circuit - the intensity of the current is equal to the electromotive force that drives it divided by the resistance of the circuit.

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






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






10. 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.






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






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






13. The rotating member of an electrical machine.






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






15. A generator that produces alternating current.






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






17. One millionth of a volt.






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






19. 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.






20. One- thousandth of a ampere






21. A measuring device.






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






23. One millionth of an ohm.






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






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






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






27. 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.






28. A unit of POWER. 1 kilowatt = 1 -000 watts






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






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






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






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






33. 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.






34. One millionth of an ampere.






35. An instrument for measuring electric current






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






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






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






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






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






41. A short circuit between two energized conductors and/or an energized conductor and a grounded phase. Very high current flow.

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






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






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






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






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






47. One- thousandth of volt.






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






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






50. The unit of Electro- Motive Force