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






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






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






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






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






6. A unit of power.






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






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






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






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






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






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






13. The dissimilar metals which are placed in an electrolyte to form a cell.






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






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






16. One millionth of a volt.






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






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






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






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






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






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






23. 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.






24. The unit of Electro- Motive Force






25. 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)






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






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






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






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






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






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






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






33. One millionth of an ohm.






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






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






36. 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.






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






38. 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.






39. An instrument for measuring electric current






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






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

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42. 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.






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






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






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






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






48. 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.






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






50. 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.