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






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






3. 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)






4. One million ohms.






5. 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.






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






7. (Lode Stone) Certain type of mineral ore which has the natural Properties of a magnet.






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






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






10. The unit of resistance. It is the resistance through which a voltage of 1 volt will produce a current of 1 ampere.






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






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






13. 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.






14. A measuring device.






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






16. 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.






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






18. Opposition to current flow






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






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






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






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






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






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






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






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






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






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






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






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






31. One- thousandth of a ampere






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






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






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






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






36. 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.






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






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






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






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






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






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






43. An instrument for measuring electric current






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






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






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






47. Negative charge of electricity






48. 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.






49. A material which CANNOT be magnetized. Example: Wood - Glass - Brass - Rubber...






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