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






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






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






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






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






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

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7. 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.






8. An instrument for measuring electromotive force in volts. It must be connected across the load that causes the votage drop.






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






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






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






12. One millionth of an ohm.






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






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






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






16. 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)






17. The area surrounding a magnet in which magnetic properties are exhibited






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






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






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






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






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






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






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






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






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






28. The unit of Electro- Motive Force






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






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






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






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






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






34. 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.






35. Opposition to current flow






36. A generator that produces alternating current.






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






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






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






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






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






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






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






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






46. 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.






47. 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.






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






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






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







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