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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 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.






2. 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.






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






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






5. 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.






6. A unit of power.






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






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






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






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






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






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






13. The unit of Electro- Motive Force






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






15. A measuring device.






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






17. 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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18. The property of a material that opposes the flow of current.






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






20. 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.






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






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






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






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






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






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






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






28. 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.






29. The rotating member of an electrical machine.






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






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






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






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






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






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






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






37. Smallest part a substance can physically divided into composed of 2 or more atoms.






38. 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)






39. 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.






40. A generator that produces alternating current.






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






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






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






44. 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.






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






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






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






48. One millionth of an ampere.






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






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

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