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






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






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






4. One millionth of a volt.






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






6. 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.






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






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






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






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






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






12. 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.






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






14. 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.






15. The unit of Electro- Motive Force






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






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






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






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






20. 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






21. 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.






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






23. 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.






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






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






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






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






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






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






30. 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.






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






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






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






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






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






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






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






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






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






40. An instrument for measuring electric current






41. 1.Speed of conductors cutting lines of force 2.Strength of the magnetic field 3.Length of conductors cutting through the field






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






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






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






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






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






47. Total and complete opposition to the flow of electrons






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






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