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






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






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






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






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






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






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






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






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






10. 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.






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






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






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






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






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






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






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






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






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






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






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






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






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






24. One- thousandth of a ampere






25. 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)






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






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






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






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






30. An instrument for measuring electric current






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






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






33. The rotating member of an electrical machine.






34. A generator that produces alternating current.






35. Total and complete opposition to the flow of electrons






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






37. Opposition to current flow






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

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39. One millionth of an ampere.






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






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






42. Negative charge of electricity






43. A measuring device.






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






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






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

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






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






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






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