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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. Negative charge of electricity






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






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






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






5. A generator that produces alternating current.






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






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






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






9. The rotating member of an electrical machine.






10. One millionth of an ohm.






11. 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)






12. Total and complete opposition to the flow of electrons






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






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






15. One millionth of an ampere.






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






17. The center portion of an atom which has a positive electrical charge.






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






19. 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






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






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






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






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






24. 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.






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






26. A measuring device.






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






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






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






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






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






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






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






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






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






36. One- thousandth of a ampere






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






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






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






40. 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.






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






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






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






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






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






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






47. An instrument for measuring electric current






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






49. The unit of Electro- Motive Force






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

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