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






2. One millionth of an ohm.






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






4. One millionth of an ampere.






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






6. A measuring device.






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






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






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






10. 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.






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






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






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






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






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






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






17. A unit of power.






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






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






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






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






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






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






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






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






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






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






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






30. 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)






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






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






33. 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.






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






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






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






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






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






39. One million ohms.






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






41. 1.Speed of conductors cutting lines of force 2.Strength of the magnetic field 3.Length of conductors cutting through the field






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






43. A generator that produces alternating current.






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






45. Negative charge of electricity






46. The rotating member of an electrical machine.






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






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






49. One- thousandth of volt.






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