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






2. A unit of power.






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






4. A generator that produces alternating current.






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






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






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






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






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






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






11. One- thousandth of volt.






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






13. 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.






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






15. Negative charge of electricity






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






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






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






19. The unit of Electro- Motive Force






20. 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.






21. 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.






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






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






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

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25. Opposition to current flow






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






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






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






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






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






31. A measuring device.






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






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






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






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






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






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






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






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

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






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






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






43. 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.






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






45. 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.






46. 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.






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






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






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