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






2. Opposition to current flow






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






4. 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






5. One million ohms.






6. 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.






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






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






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






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






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






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






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






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






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






16. A unit of power.






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






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






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






21. An instrument for measuring electrical power. Most common use: The meter of your house to measure electrical consumption.






22. 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.






23. One millionth of a volt.






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






25. A generator that produces alternating current.






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






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






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






29. 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.






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

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31. 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.






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






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






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






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






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






37. A measuring device.






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






39. Negative charge of electricity






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






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






42. 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.






43. One- thousandth of volt.






44. One- thousandth of a ampere






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






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






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






48. An instrument for measuring electric current






49. The rotating member of an electrical machine.






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