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






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






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

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






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






6. 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.






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






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






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






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






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






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






13. One million ohms.






14. One- thousandth of a ampere






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






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

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






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






19. A measuring device.






20. The unit of Electro- Motive Force






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






22. The moving part of a dynamo or motor consisting of coils of wire around an iron core.






23. 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.






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






25. 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.






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






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






28. An alternating current which current cycle begins later that its voltage cycle.






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






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






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






32. An instrument for measuring electric current






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






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. Total and complete opposition to the flow of electrons






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






37. 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.






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






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






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






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






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






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






44. A unit of power.






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






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






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






48. 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.






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






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