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






2. 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.






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






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






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






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






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






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






9. A unit of power.






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






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






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






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






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






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






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






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






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






19. 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)






20. One millionth of a volt.






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






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






23. An instrument for measuring electric current






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






25. One- thousandth of a ampere






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






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






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






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






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






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






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

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






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






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






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






37. A generator that produces alternating current.






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






39. One million ohms.






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






41. In an electrical circuit - or part of an electric circuit - the intensity of the current is equal to the electromotive force that drives it divided by the resistance of the circuit.

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42. 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.






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






44. 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.






45. 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.






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






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






48. 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






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






50. One millionth of an ohm.