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






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






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






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






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






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






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






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






9. A machine which utilizes magnetism to produce an EMF and consequently - an electric circuit.






10. 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






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






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






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






14. 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.






15. 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)






16. Meter used to measure resistance in an electrical circuit.






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






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






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






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






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






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






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






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






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






26. The unit of Electro- Motive Force






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






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






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






30. The unit of resistance. It is the resistance through which a voltage of 1 volt will produce a current of 1 ampere.






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






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






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






34. A unit of power.






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






36. One million ohms.






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






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






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






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






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






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






43. One- thousandth of volt.






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






45. 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.






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






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






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






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






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