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






3. One- thousandth of volt.






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






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






6. 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.






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






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






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






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






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






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






13. One million ohms.






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






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






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






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






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






19. The voltage dissipation between any two points in a circuit. The voltage 'dropped' or 'dissipated' in forcing current through a resistance.






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






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






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






23. 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






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






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






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






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






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






29. Transformer coil connected to the load. (Output side of a transformer regardless of voltage).






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






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






32. 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.






33. 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)






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






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

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






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






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






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






40. One millionth of an ohm.






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






42. The rotating member of an electrical machine.






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






44. Total and complete opposition to the flow of electrons






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






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






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






48. (EMF) The force created by an electric generator (or by other means) which causes current to flow. (Same as Voltage - Volts - Electric Potential - Pressure).






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






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







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