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






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






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






4. An instrument for measuring electric current






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






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






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






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






9. A cell which is rechargeable. Uses materials which change in compostition during delivery of current - but may be restored to original condition upon recharge.






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






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






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






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






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






15. 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.






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






17. One millionth of an ampere.






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






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






20. Opposition to current flow






21. Negative charge of electricity






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






23. 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.






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






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






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






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.


28. An instrument for measuring electrical power. Most common use: The meter of your house to measure electrical consumption.






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






30. A unit of power.






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






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






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






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






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






36. One million ohms.






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






38. 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.






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






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






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






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






43. One- thousandth of volt.






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






45. 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.






46. A measuring device.






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






48. Total and complete opposition to the flow of electrons






49. 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.






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