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






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






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






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






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






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






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






8. Term applied to the loss of voltage in forcing current through any portion of a circuit. Different factors will cause a drop; material - size - (cross - sectional area) length - temperature.






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






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






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






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






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






14. Shows relationship between Current - Voltage - Wattage and Resistance.

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






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






17. One million ohms.






18. 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.






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






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

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






22. One- thousandth of a ampere






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






24. 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.






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






26. One- thousandth of volt.






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






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






29. 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






30. 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.






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






32. The unit of Electro- Motive Force






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






34. A measuring device.






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






36. Total and complete opposition to the flow of electrons






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






38. 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.






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






40. A circuit with only one path for current to flow. There are no branches.






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






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






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






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






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






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






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






48. A material which CANNOT be magnetized. Example: Wood - Glass - Brass - Rubber...






49. 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.






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