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






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






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






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






5. 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.






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






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






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






9. Opposition to current flow






10. A short circuit between two energized conductors and/or an energized conductor and a grounded phase. Very high current flow.

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11. 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






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






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






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






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






16. 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.






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






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






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






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






21. The rotating member of an electrical machine.






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






23. An instrument for measuring electric current






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






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






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






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






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






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






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






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






32. 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.






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






34. One millionth of an ampere.






35. 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.






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






37. One millionth of a volt.






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






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






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






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






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






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






44. Total and complete opposition to the flow of electrons






45. A unit of power.






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






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






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






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






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