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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 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.






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






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






4. A transformer designed to raise the voltage of an alternating current. Most common use; In a generating plant to raise the voltage.






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






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






7. One millionth of an ampere.






8. A generator that produces alternating current.






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






10. 1.Material itself (Atomic Structure - Good conductor or Bad) 2.Length of the conductor 3.Cross - sectional area (Size) 4.Temperature






11. 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.






12. One millionth of an ohm.






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






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






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






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






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






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






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






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






22. An instrument for measuring electric current






23. The rotating member of an electrical machine.






24. A unit of power.






25. 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.






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






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






28. 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.






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






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






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






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






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






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






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






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






37. One million ohms.






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






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






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






41. One millionth of a volt.






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






43. 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.






44. A measuring device.






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






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






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






48. 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)






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






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