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






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






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






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






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






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






7. 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)






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






9. A generator that produces alternating current.






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






11. Total and complete opposition to the flow of electrons






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






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






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






15. 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






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






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






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






20. Negative charge of electricity






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. The unit of Electro- Motive Force






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






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






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






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






29. One millionth of a volt.






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






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






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






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






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






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






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






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






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






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






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






41. 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.






42. 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.






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






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






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






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






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






48. An instrument for measuring electric current






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






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