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






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






3. The dissimilar metals which are placed in an electrolyte to form a cell.






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






5. The unit of Electro- Motive Force






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






7. 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.






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






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






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






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






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






13. A circuit with more than one path. Current branches to flow in every available path.






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






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






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






17. 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.






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






19. 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.






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






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






22. 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.






23. One millionth of an ampere.






24. 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.






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






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






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






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






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






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






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






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






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






34. Negative charge of electricity






35. One- thousandth of a ampere






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






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

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






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






40. One millionth of a volt.






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






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






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






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






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






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






47. 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.






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






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






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