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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. 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.






2. The number of cycles per second. Example: 60 cycles per second alternating current.






3. The unit of Electro- Motive Force






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






5. One millionth of a volt.






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






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






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






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






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






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






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






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






14. 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.






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






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






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






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






19. 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.






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






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






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






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






24. One- thousandth of a ampere






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






26. 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.






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






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






29. 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.






30. A unit of power.






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






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 resistor designed so that its resistance is readily adjusted.






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






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






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






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






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






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






41. 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.






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






43. A generator that produces alternating current.






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






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






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






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






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






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






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