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






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






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

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






6. Total and complete opposition to the flow of electrons






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






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






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






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






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






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






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

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






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






16. Opposition to current flow






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






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






19. The rotating member of an electrical machine.






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






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






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






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






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






25. An instrument for measuring electric current






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






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






28. The area surrounding a magnet in which magnetic properties are exhibited






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






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






31. 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.






32. 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.






33. One- thousandth of a ampere






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






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






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






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






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






39. 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)






40. The unit of Electro- Motive Force






41. A certain force exhibited by some materials which give them the ability to attract other materials. Principally iron or its alloys.






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






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






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






45. One millionth of a volt.






46. A generator that produces alternating current.






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






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






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






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







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