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






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






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






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






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






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






7. 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.






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






9. The unit of Electro- Motive Force






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






11. One millionth of a volt.






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






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






14. The process of producing an electromotive force in a conductor as a result of the cutting of magnetic lines of force by a conductor.






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






16. A generator that produces alternating current.






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






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






19. Total and complete opposition to the flow of electrons






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






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






22. One millionth of an ohm.






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






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






25. The center portion of an atom which has a positive electrical charge.






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






27. 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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28. 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.






29. The opposite ends of a magnet where the magnetism is concentrated. Each magnet has two poles - designated as north and south.






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






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






32. The rotating member of an electrical machine.






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






34. One- thousandth of volt.






35. Negative charge of electricity






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






37. 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.






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






39. 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.






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






41. 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.






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






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






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






45. 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.






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






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






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






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






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