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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 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.






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






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






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






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

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






7. 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.






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






9. One million ohms.






10. Total and complete opposition to the flow of electrons






11. 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)






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






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






14. One millionth of an ohm.






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






16. An instrument for measuring electric current






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






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






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






20. A connection of circuit of low resistance. Current through each of the end- to- end devices is exactly the same. Only one path for the current.






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






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






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






24. A measuring device.






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






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






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






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






29. The time rate at which work is done or energy is transferred. When a pressure of 1 volt sends a current of 1 ampere through a resistance of 1 ohm - the power in the circuit is said to be 1 watt.






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






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






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

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






35. 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.






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






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






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






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






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






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






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






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






44. The rotating member of an electrical machine.






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






46. The unit of Electro- Motive Force






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






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






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






50. Opposition to current flow