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






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






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






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






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






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






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






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






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






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






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






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






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






14. The rotating member of an electrical machine.






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






16. 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.






17. One million ohms.






18. An instrument for measuring electric current






19. 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






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






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






22. A circuit in which there is resistance (load) connected both in series and parallel.






23. A measuring device.






24. A unit of power.






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






26. 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.






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






28. 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.






29. 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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30. A generator that produces alternating current.






31. 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.






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






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






34. Opposition to current flow






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






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






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

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






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






40. 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.






41. 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)






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






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






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






45. Negative charge of electricity






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






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






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






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






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