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






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






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






4. Electric charges at rest. Caused by friction of materials - where a surplus of electrons exists and may be discharged.






5. An instrument for measuring electric current






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






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






8. 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.






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






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






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






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






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






14. One- thousandth of a ampere






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






16. 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.






17. 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.






18. 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.






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






20. One million ohms.






21. 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.






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

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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






38. The rotating member of an electrical machine.






39. 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.






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






41. 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.






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






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






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






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






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






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






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






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






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