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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 rate of movement of electrons through a conductor.






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






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






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






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






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






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






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






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






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






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






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






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






14. A generator that produces alternating current.






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






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






17. 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.






18. A unit of power.






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






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






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






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






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






24. 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)






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






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






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






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






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






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






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






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






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






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






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






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






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






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






41. 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.






42. 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.






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






44. The unit of Electro- Motive Force






45. A measuring device.






46. 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.






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






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






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






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