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






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






3. One- thousandth of volt.






4. 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.






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






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






7. A unit of power.






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






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






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






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






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






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






14. Total and complete opposition to the flow of electrons






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






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






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






18. The unit of Electro- Motive Force






19. One millionth of an ampere.






20. One- thousandth of a ampere






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






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






23. 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






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






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






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






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






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






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






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






31. One millionth of a volt.






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






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






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






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






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






38. A measuring device.






39. The rotating member of an electrical machine.






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






41. A generator that produces alternating current.






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






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






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






45. The space around a magnet in which the magnetic force is felt.






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






47. 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.






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






49. 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.






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

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