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






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






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






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






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






6. 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.


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






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






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






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






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






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






13. 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.






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






15. 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.






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


17. One- thousandth of a ampere






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






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






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






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






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






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






24. Total and complete opposition to the flow of electrons






25. 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.






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






27. The unit of Electro- Motive Force






28. 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.






29. One millionth of an ampere.






30. An instrument for measuring electric current






31. 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.






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






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






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






35. The part of the magnet where the magnetic force is most concentrated. Commonly referred to as the North or South pole or the positive or negative poles)






36. 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.






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






38. 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






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






40. Negative charge of electricity






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






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






43. One millionth of a volt.






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






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






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






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






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






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






50. A unit of POWER. 1 kilowatt = 1 -000 watts