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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. The unit of Electro- Motive Force






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






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






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






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






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






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






8. 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.






9. One- thousandth of a ampere






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






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






12. An instrument for measuring electric current






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






14. One millionth of a volt.






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






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






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






18. One- thousandth of volt.






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






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






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






22. A complete path provided for the flow of electrons. Consists of a source - with a closed conducting path leading from the source and back to the source






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






24. 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.






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






26. A circuit carrying three alternating currents whose cycles begin one after another. 120 electrical degrees apart.






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






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






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






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






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






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






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

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






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






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






39. 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.






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






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






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






43. 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.






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






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






46. 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.






47. A unit of work or ENERGY. 1 kilowatt hour = 1 -000 watt hours






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






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






50. A measuring device.