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






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






3. 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.






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






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






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






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






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






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






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






11. A unit of power.






12. An instrument for measuring electric current






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






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






15. One millionth of an ohm.






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






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






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






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






20. The rotating member of an electrical machine.






21. A transformer designed to raise the voltage of an alternating current. Most common use; In a generating plant to raise the voltage.






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






23. 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)






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






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






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






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






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






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






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






31. 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.






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






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






34. 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.






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






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






37. 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.






38. The unit of electromotive force - potential - pressure - or voltage which produces a current of one ampere in a circuit having a resistance of 1 ohm. This is the force created to move electrons through a circuit.






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






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






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






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






43. One- thousandth of volt.






44. 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.






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






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






47. A device which capacity is its chief electrical property; a device for storing or holding an electric charge; a capacitor.






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






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






50. Negative charge of electricity