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






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






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






4. An alternating current which current cycle begins earlier than its voltage cycle.






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






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






7. 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.






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






9. 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.






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






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






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






13. 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.






14. 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






15. 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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16. One millionth of a volt.






17. Term applied to the loss of voltage in forcing current through any portion of a circuit. Different factors will cause a drop; material - size - (cross - sectional area) length - temperature.






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






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






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






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






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






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






24. The liquid solution (sometime a paste) in which the electrodes are placed.






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






26. A unit of power.






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






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






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






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






31. 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.






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






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






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






35. 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)






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






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






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






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






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






41. One millionth of an ampere.






42. The rotating member of an electrical machine.






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






44. A measuring device.






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






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






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






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






49. The unit of Electro- Motive Force






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