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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. 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.


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






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






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






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






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


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






8. A measuring device.






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






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






11. Total and complete opposition to the flow of electrons






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






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






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






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






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






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






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






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






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






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






22. Negative charge of electricity






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






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






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






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






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






28. The time rate at which work is done or energy is transferred. When a pressure of 1 volt sends a current of 1 ampere through a resistance of 1 ohm - the power in the circuit is said to be 1 watt.






29. One millionth of a volt.






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






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






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






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






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






35. One- thousandth of a ampere






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






37. 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.






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






39. 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.






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






41. A unit of work or ENERGY. 1 kilowatt hour = 1 -000 watt hours






42. One millionth of an ohm.






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






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






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






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






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






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






49. One million ohms.






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