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






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






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






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






5. 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.






6. One millionth of a volt.






7. The time rate at which work is done or energy is transferred. When a pressure of 1 volt sends a current of 1 ampere through a resistance of 1 ohm - the power in the circuit is said to be 1 watt.






8. Total and complete opposition to the flow of electrons






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






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






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






12. An instrument for measuring electric current






13. One millionth of an ohm.






14. 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.






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






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






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






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






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






20. 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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21. One millionth of an ampere.






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






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






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






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






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






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






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






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






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






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






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






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






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






35. A unit of power.






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






37. Negative charge of electricity






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






39. (Lode Stone) Certain type of mineral ore which has the natural Properties of a magnet.






40. A transformer designed to lower voltage of an alternating current. Most common type of transformer used on a power system.






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






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






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






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






45. 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.






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






47. 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.






48. Shows relationship between Current - Voltage - Wattage and Resistance.

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49. 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.






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