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






2. One millionth of an ohm.






3. The unit of Electro- Motive Force






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






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






6. Total and complete opposition to the flow of electrons






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






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






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






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






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






12. One millionth of an ampere.






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






14. 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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15. One million ohms.






16. An instrument for measuring electric current






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






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






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






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






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






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






23. The rotating member of an electrical machine.






24. Negative charge of electricity






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






26. One- thousandth of volt.






27. The area surrounding a magnet in which magnetic properties are exhibited






28. Opposition to current flow






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






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






31. 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.






32. A unit of power.






33. 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.






34. 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.






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






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






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






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

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






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






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






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






43. 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)






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






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






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






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






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






50. 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.