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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 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. A generator that produces alternating current.






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






5. One- thousandth of volt.






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






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






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






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






10. One- thousandth of a ampere






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






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






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






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






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






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






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






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






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






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






21. Meter used to measure resistance in an electrical circuit.






22. A device used to change the voltage of an alternating current circuit.






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






24. One millionth of an ampere.






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






26. A measuring device.






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






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






29. A circuit with more than one path. Current branches to flow in every available path.






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






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






32. Opposition to current flow






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






34. One million ohms.






35. A unit of power.






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






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






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






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






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






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






43. Negative charge of electricity






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






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






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






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






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. One millionth of an ohm.






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







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