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






2. A generator that produces alternating current.






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






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






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






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






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






9. 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






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






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






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






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






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






15. 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.






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






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






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






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






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






21. One millionth of a volt.






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






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






24. 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.






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






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






27. 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.






28. Total and complete opposition to the flow of electrons






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






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






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






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






33. One millionth of an ampere.






34. 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.






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






36. 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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37. 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.






38. 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.






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






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






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






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






43. An instrument for measuring electric current






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






45. A unit of power.






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

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






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






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






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