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






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






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






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






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






6. One millionth of an ampere.






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






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

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






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






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






12. One millionth of an ohm.






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






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






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






16. 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.






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






18. An instrument for measuring electric current






19. One- thousandth of a ampere






20. Opposition to current flow






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






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






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






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






25. 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.






26. 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






27. One millionth of a volt.






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






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






30. 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.






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






32. 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.






33. 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.






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

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






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






37. 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)






38. The rotating member of an electrical machine.






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






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






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






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






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






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






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






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






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






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






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






50. Negative charge of electricity