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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. Total and complete opposition to the flow of electrons






2. An instrument for measuring electric current






3. 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.






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






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






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






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






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






9. One millionth of an ohm.






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






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






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






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






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






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






17. One million ohms.






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






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






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






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






22. A unit of power.






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






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






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






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






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






28. Opposition to current flow






29. One millionth of an ampere.






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






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






32. 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.






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






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






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






36. 1.Material itself (Atomic Structure - Good conductor or Bad) 2.Length of the conductor 3.Cross - sectional area (Size) 4.Temperature






37. 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.






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






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






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






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






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






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






44. 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)






45. The rotating member of an electrical machine.






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






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






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






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






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