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






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






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






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






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






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






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






8. Total and complete opposition to the flow of electrons






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






10. 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






11. One millionth of an ampere.






12. The path of an electric current. To permit a steady flow of current - the path must be complete. Commonly - a complete circuit includes a device for the production of an electromotive force - connecting wires - and a device supplied with electricity.






13. 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.






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






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






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






17. 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.






18. A device which capacity is its chief electrical property; a device for storing or holding an electric charge; a capacitor.






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






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






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






22. Lines representing the direction of the magnetic force in a magnetic field.






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






24. The unit of Electro- Motive Force






25. 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)






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






44. A unit of power.






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






46. An instrument for measuring electric current






47. The rotating member of an electrical machine.






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






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






50. One million ohms.