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






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






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






4. 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.






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






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






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






8. Single NEGATIVE electrical charge. Orbits around the nucleus some in paths close to the nucleus - others in paths varying distance from the nucleus.






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






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






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






12. One millionth of a volt.






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






14. One millionth of an ohm.






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






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






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






18. A unit of power.






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






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






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






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






23. One- thousandth of a ampere






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






25. 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.






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






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






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






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

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31. Coil connected to the source of power on a transformer.






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






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






34. In a battery - the electrode which takes up the electrons returning from the external circuit.






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






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






37. Negative charge of electricity






38. 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.






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






40. One million ohms.






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






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






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






44. A measuring device.






45. A circuit with two or more paths for the current to take.






46. A generator that produces alternating current.






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






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






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






50. 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.







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