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






2. A certain force exhibited by some materials which give them the ability to attract other materials. Principally iron or its alloys.






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






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






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






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






7. Total and complete opposition to the flow of electrons






8. 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.






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






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






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






12. 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)






13. One- thousandth of a ampere






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






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






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






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






19. Negative charge of electricity






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






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






22. An instrument for measuring electric current






23. The rotating member of an electrical machine.






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






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






26. One- thousandth of volt.






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






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






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






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






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






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






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






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. 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.






36. 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.






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






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






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






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






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






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






43. 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.






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






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






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






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






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

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