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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 generator that produces alternating current.






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






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






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






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






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


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






8. A unit of power.






9. One millionth of an ampere.






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






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


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






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






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






15. One millionth of an ohm.






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






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






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






19. 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.






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






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






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






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






24. One million ohms.






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






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






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






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






29. A rod or strip composed of two metals having different rates or coefficients of expansion. Upon being heated - it bends in a direction which causes the material with the greater rate of expansion to be on the outside.






30. Opposition to current flow






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






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






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






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






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






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






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






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






39. An instrument for measuring electric current






40. One millionth of a volt.






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






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






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






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






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






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






47. Negative charge of electricity






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






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






50. 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.