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






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






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

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






5. An instrument for measuring electric current






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






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






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






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






10. Total and complete opposition to the flow of electrons






11. 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.






12. 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.






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






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






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






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






17. 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.






18. One million ohms.






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






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






21. A material that has many free electrons thus allowing electric current to flow through it easily.






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






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






24. The unit of Electro- Motive Force






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






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






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






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






29. 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.






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






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






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






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






35. 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.






36. An instrument for measuring electrical power. Most common use: The meter of your house to measure electrical consumption.






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






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






39. 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)






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






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






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






43. Those electrons in orbit nearest the nucleus - not easily dislodged from their normal orbits.






44. One millionth of a volt.






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






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






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






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






49. 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.






50. Negative charge of electricity