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






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






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

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4. One millionth of an ohm.






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






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






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






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






9. 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.






10. The rotating member of an electrical machine.






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






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






13. 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






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






15. One- thousandth of volt.






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






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

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18. Negative charge of electricity






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






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






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






22. One million ohms.






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






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






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






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






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






28. 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.






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






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






31. 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.






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






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






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






35. 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.






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






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






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






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






40. An instrument for measuring electric current






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






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






43. 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.






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






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






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






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






48. A generator that produces alternating current.






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






50. 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.