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






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






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






4. 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)






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






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






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






8. One- thousandth of a ampere






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






10. 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.


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






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






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






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






15. 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.






16. 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.






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






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






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






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






21. Smallest part a substance can physically divided into composed of 2 or more atoms.






22. The unit of Electro- Motive Force






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






24. 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






25. 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.






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






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






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






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






30. The rotating member of an electrical machine.






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






32. The difference between the electrical condition of one point in an electric circuit and that of another point which tends to cause current to flow between two points. Measured in volts.






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






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






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






36. An instrument for measuring electric current






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






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






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






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






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






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






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






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






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






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






47. The unit of resistance. It is the resistance through which a voltage of 1 volt will produce a current of 1 ampere.






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






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






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